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如何在 revtex 4.2 中平衡两个表的两列

tag-icon • tag-icon tables two-column revtex tikzmark
如何在 revtex 4.2 中平衡两个表的两列

我正在使用 revtex 4.2 作为公司文件的基础（直到我学到足够的知识来编写自己的课程）。在某个文档中，我有一个附录，其中包含几个表格以及一些文本。当我编译该文档时，下面示例第二页上的附录按预期显示在两列中，但底部参差不齐。左侧列比右侧列长。如果将附录内容的文本部分拆分在左右列之间（最好位于这些列的顶部），则可以使表格的底部齐平。我该如何做到这一点？我确实希望将这两个表格与附录文本的其余部分保留在同一页面上，并打算将整个附录部分复制并粘贴到使用相同模板的多个文档中。

附录 A，第 2 页来自下面的示例代码。

 \documentclass[
 aapm,
 showkeys,
 mph,
 amsmath,
 amssymb,
 nofootinbib,
 nobibnotes,
 %preprint,
 reprint,
 %draft,
 %final,
]{revtex4-2}





%----------------------------------------------%
%%%%%%%%%%%% Section Labeling Setup %%%%%%%%%%%%
%----------------------------------------------%
\renewcommand{\thesection}{\arabic{section}}
\renewcommand{\thesubsection}{\thesection.\arabic{subsection}}
\renewcommand{\thesubsubsection}{\thesubsection.\arabic{subsubsection}}
\renewcommand{\thefootnote}{\roman{footnote}}
%----------------------------------------------%





%----------------------------------------------%
%%%%%%%%%%%%%%% Package Imports %%%%%%%%%%%%%%%%
%----------------------------------------------%
\usepackage{ifdraft}
\usepackage[]{graphicx}
\usepackage{dcolumn}
\usepackage{bm}
\usepackage{lipsum}
\usepackage[]{float}
\usepackage{placeins}
\usepackage[]{longtable}
%----------------------------------------------%





%----------------------------------------------%
%%%%%%%%%%%%%%%% ToDo Notes Setup %%%%%%%%%%%%%%
%----------------------------------------------%
\usepackage[obeyDraft]{todonotes}
\makeatletter
\if@todonotes@disabled
\newcommand{\hlfix}[2]{#1}
\else
\newcommand{\hlfix}[2]{\texthl{#1}\todo[
                                        color=yellow,
                                        size=\tiny,
                                        ]{#2}}
\fi
\makeatother
%----------------------------------------------%





%----------------------------------------------%
%%%%%%%%%%%%%%% Versioning Setup %%%%%%%%%%%%%%%
%----------------------------------------------%
\usepackage{mVersion}
\setVersion{0.1}
\increaseBuild
\renewcommand{\version}{v\versionnumber \ifoptionfinal{}{(\thebuildcounter)}}
%----------------------------------------------%





%----------------------------------------------%
%%%%%%%%%% Document Name and ID Setup %%%%%%%%%%
%----------------------------------------------%
\newcommand{\DocTitle}{xxxxxxx xxxxx xxx xx-xxxx xxxxxxxxx xxxxxxx xx xxxxxxxxxx xxxx xxx x 1111}
\newcommand{\DocDivision}{xxxxx}
\newcommand{\DocGroup}{xxx}
\newcommand{\DocType}{xx}
\newcommand{\DocNumber}{001}
\newcommand{\VersionString}{\DocType -\DocNumber -\version}
\newcommand{\DocExt}{.pdf}
\newcommand{\FileName}{xx\_xxxxxxxxx\_xxxxxx\_xxxx2263\_\version\DocExt}
%----------------------------------------------%





%----------------------------------------------%
%%%%%%%%%%%%%%% Draftmark Setup %%%%%%%%%%%%%%%%
%----------------------------------------------%
\usepackage{tikz}
\usepackage{xcolor}
\newsavebox\wmbox
\savebox\wmbox{\tikz[
                     color=red,
                     opacity=0.15,
                     ]%
               \node[
                     rectangle,%
                     draw=white,%
                     ultra thick,%
                     scale=7.7,%
                     rotate=45,
                     ]{DRAFT\version};}
\AddToHook{shipout/foreground}{\put(.5in, -.85\paperheight){\ifoptionfinal{}{\usebox\wmbox}}}
%----------------------------------------------%

    
    
               

%----------------------------------------------% 
%%%%%%%%%%%%%%% Hyperlink setup %%%%%%%%%%%%%%%%
%----------------------------------------------%
\usepackage{url}
\usepackage{hyperref}
\hypersetup{
            final,
            colorlinks=true, 
            linkcolor=blue,
            filecolor=magenta,      
            urlcolor=cyan,
            citecolor=blue,
            pdftitle={\DocTitle},
            pdfauthor={xxxx x. xxxxxxxx},
            pdfinfo={document version={\versionnumber},
                     build number={\thebuildcounter}},
            }
%----------------------------------------------%





%----------------------------------------------%
%%%%%%%%%%%%% Classification Setup %%%%%%%%%%%%%
%----------------------------------------------%
\newcommand{\INTERNAL}{\fcolorbox{black}{gray!15}{\makebox[\dimexpr\linewidth-2\fboxsep-2px][c]{FOR INTERNAL USE ONLY}}}%
\newcommand{\CONFIDENTIAL}{\fcolorbox{black}{red!25}{\makebox[\dimexpr\linewidth-2\fboxsep-2px][c]{CONFIDENTIAL}}}%
\newcommand{\SECRET}{\fcolorbox{black}{red!25}{\makebox[\dimexpr\linewidth-2\fboxsep-2px][c]{SECRET}}}%
\newcommand{\TOPSECRET}{\fcolorbox{black}{red}{\makebox[\dimexpr\linewidth-2\fboxsep-2px][c]{TOP SECRET}}}%
\newcommand{\ITARNF}{\fcolorbox{black}{red}{\makebox[\dimexpr\linewidth-2\fboxsep-2px][c]{ITAR-NOFORN}}}%
\newcommand{\UNCLASSIFIED}{\fcolorbox{black}{green!25}{\makebox[\dimexpr\linewidth-2\fboxsep-2px][c]{UNCLASSIFIED}}}
\newcommand{\UNRESTRICTED}{\fcolorbox{black}{green!25}{\makebox[\dimexpr\linewidth-2\fboxsep-2px][c]{UNRESTRICTED}}}
\newcommand{\classification}{\INTERNAL}
%----------------------------------------------%





%----------------------------------------------%
%%%%%%%%%%%%% Header/Footer Setup %%%%%%%%%%%%%%
%----------------------------------------------%
\usepackage{fancyhdr}
\pagestyle{fancy}
\fancyhf{}
\chead{\classification\\\FileName}
\lhead{\VersionString \ifoptionfinal{}{\ DRAFT}}
\rhead{\thepage$|$\pageref{LastPage}}
\cfoot{\classification}
\renewcommand{\footrulewidth}{\headrulewidth}
%----------------------------------------------%





%----------------------------------------------%
%%%%%%%%%%%%%%%% Newpage Setup %%%%%%%%%%%%%%%%%
%----------------------------------------------%
\makeatletter
\newcommand*{\balancecolsandclearpage}{%
  \close@column@grid
  \clearpage
  \twocolumngrid
}
\makeatother
%----------------------------------------------%





%----------------------------------------------%
%************** Begin Document ****************%
%----------------------------------------------%
\begin{document}
\title[]{\DocTitle}
%\thanks{Footnote to title of article.}

\author{x.x. xxxxxxxx}
\email{xxxxxxxx\[email protected]}
\author{x. xxxxxx}
\email{[email protected]}
\affiliation{%
\begin{minipage}{\textwidth}
\vspace{0.5\baselineskip}
xxx xxxxx xxxxxxx%\\
%4554 xxxxxxxxx xx\\
%xxxxxx xxxxx, xx 11111\\
%xxxxxx xxxxxx
\end{minipage}
}

\date{\today}

\begin{abstract}
xxxx xxxxxxxx xxxxxxxx xx xxxxxxxx xx xxx xxxxxxx xxxxxxxxxxx, xxxxxxx xxxxxxx, xxx xxxx xxxxxxxxxx xxxxxxxxxxxx xxx xxxxxxxxxx xxxxxxx xxxxxxxxx xxxxxxx xx xxxxxxxxxx xxxx xxx x 1111 xx x xxxxxxxxx xxxxxxxx. xxxxxxx xxx x 1111 xxx xxx xxxxxxxxxx xxxxxxxxx xxx xxxxxxxxxxx xxx xxxx xxxxxxx.
\end{abstract}

\keywords{xxxxxxx xxx xxxxxxxxxxx xxxxxxxxx}
\maketitle
\thispagestyle{fancy} %required for header and footer to appear on first page
\lipsum[1-6]
\balancecolsandclearpage

\appendix
\section{xxxxxxxxxx xxxx xxxxxx (xxx) xxxxxxxxxxxxx xxx 11 xxx \S11}\label{ap:etw}
\FloatBarrier 
xxxxxxxxxx: 11 xxx \S 11.111-11, \S\S 1111.111-1111.111.

xxx \emph{xxxxx-xxxx xxxxxxxx} xxxx x \emph{xxxxxx xxxxxxx xxxxxx} xx xxxx xxxx xx xxxxx xx 1,111 xxx, xxxx xxx \emph{xxxxxx xxxxxxx xxxxxx} xx xxx `xxxxx' xxxxxx xx xxxxx \ref{tab:etw}, xxx xxx xxx xxxxxxxxxxxxx xxxxx xxxx xxx `xxx' xxxxxx xx xxx xxxxxxxxxx xxxx xxxxxx.

xxx \emph{xxxxx-xxxx xxxxxxxx} xxxx x \emph{xxxxxx xxxxxxx xxxxxx} xx xxxxxxx xxxx 1,111 xxx., xxxxxxxxxx xxxx xxxxxx xx 1,111 xxx. 

xxx xxxxx xxxx 1994 xxx xxxxx \emph{xxxxx xxxxx-xxxx xxxxxx} xxx xxxxxxx xx xxx xxxx 0 xxxxxxxxx xx 11 xxx \S 11.111–1, xxxx xxx \emph{xxxxxxxx xxxxxx xxxxxxx xxxxxx} xx xxx `xxxxx' xxxxxx xx xxxxx \ref{tab:etw}, xxx xxx xxx xxxxxxxxxxxxx xxxxx xxxx xxx `xxx' xxxxxx xx xxx xxxxxxxxxx xxxx xxxxxx.

xxx xxxxx \ref{tab:68def} xxx xxxxxxxxxxx.
\flushbottom

\begin{table}[h]
\caption{\label{tab:68def}xxxxxxxxxx xxxx 11 xxx \S11 xxx xxx xx xxxxxxxx \ref{ap:etw}}
\begin{ruledtabular}
\begin{tabular}{p{0.25\linewidth}  p{0.7\linewidth}}
xxxx & xxxxxxx\\ \hline
xxxxxxxx xxxxxx xxxxxxx xxxxxx & xxxxxxxxx xxxxxxx xx xxxxxxx xxxx xxxxxx xxx xxxx.\\
xxxxx xxxxxxx xxxxxxx xxxx & xxx xxxx xxxxxxxx xx xxx xxxxxxxxx xxxxxxxxxx xx xxx xxxxx xxxxxxx xxxxx xxx xxxxxxxxxxxx xxxx, xxxxx xxxxxxxx xxxxx xxx xxxxxxxx xxxxxxx xxx xxx xxxxxxxxxx, xxxx x xxxxx xxxxxxxxxxxxx xx xxx xxxxxxxxxxxx xxxx xx xxx xxxxxxx.\\
xxxx & xxxxx xxxxxxxxx xx xxx xxxxxxxxxxxx xx xxx xxxxxxx xxxxxx xxxxxx xxxxxx xx x xxxxxx xxxxxxx.\\
xxxxx xxxxx-xxxx xxxxx & xxx xxxxx-xxxx xxxxx xxxxx xxxxxxx xxxx 1111 xxx xxxx.\\
xxxxx-xxxx xxxxxxx &  x xxxxxxxxx xxx xx xxxxxxxxx xxx xxxxxxxxxx xxxxxxx xx xxxxxxx 11 xxxxxxxxxx xx xxxx. \\
xxxxx-xxxx xxxxx &  xxx xxxxx xxxxxxx xxxxx xx 1,111 xxxxxx xxxx xx xxxx xxxxx xxx x xxxxxxx xxxx xxxxxx xx 1,111 xxxxxx xx xxxx xxx xxxxx xxx x xxxxx xxxxxxx xxxxxxx xxxx xx 11 xxxxxx xxxx xx xxxx, xxxxx xx: (1) xxxxxxxx xxxxxxxxx xxx xxxxxxxx xx xxxxxxxxxxxxxx xx xxxxxxxx xx xx x xxxxxxxxxx xx xxxx x xxxxxxx, xx (1) xxxxxxxx xxxxxxxxx xxx xxxxxxxxxxxxxx xx xxxxxxx xxx xxx x xxxxxxxx xx xxxx xxxx 11 xxxxxxx, xx (1) xxxxxxxxx xxxx xxxxxxx xxxxxxxx xxxxxxxx xxx-xxxxxx xx xxx-xxxxxxx xxxxxxxxx xxx xxx. \\
xxxxxx xxxxxxx xxxxxx & xxxxxxx xxxx xxxxxx xxxx 111 xxxxxx.\\
xxxxxxx xxxx xxxxxx & xxxxxx xx xxxxxxxxxxxx'x xxxxxxxxx xxxxxx xx xxx xxxxxxx xx xxxxxxxxxxx xxxxxx xxxx xxx xxxxxxxx xxxxxxxxx, xxx xxxxxx xx xxxx xx xxxxxxx xxxx xxxxxxxx, xxx xxx xxxxxx xx xxxxxxxx xxxxxxxxx xxxxxxxx xx xxxxxxxxxx xxxx 11 xxx \S 11.111-11; xxxxxxxxxx xxxxx-xxxx xxxxxx xxxxx xxxx xxx xxxx xxxxxx xxxxxxxxx xx xxx xxxxxxxxxxxx.\\
\end{tabular}
\end{ruledtabular}
\end{table}



\begin{table}[h]
\caption{\label{tab:etw}xxxxxxxxxx xxxx xxxxxx xxxxx xxxx 11 xxx \S 11.111-11, xxx xxx xx xxxxxxxx \ref{ap:etw}.}
\begin{ruledtabular}
\begin{tabular}{cc}

xxxxx & xxx\\ \hline
Up to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 1111 & 1,111 \\
1111 to 11111 & 11,111 \\
11111 to 11111 & 11,111 \\
11111 to 11111 & 11,111 \\
11111 to 11111 & 11,111 \\
11111 to 11111 & 11,111 \\
11111 to 11111 & 11,111 \\
11111 to 11111 & 11,111 \\
11111 to 11111 & 11,111 \\
11111 to 11111 & 11,111 \\
%\end{longtable}
\end{tabular}
\end{ruledtabular}
\end{table}

\FloatBarrier 

\balancecolsandclearpage

\end{document}

答案1

本解决方案使用tikzpicture来适合附录页面上的两个表格。

为了简化 tikz 模板代码，两个表格和两个标题已被定义为新命令。

C

\documentclass[
aapm,
showkeys,
mph,
amsmath,
amssymb,
nofootinbib,
nobibnotes,
%preprint,
reprint,
%draft,
%final,
]{revtex4-2}


%----------------------------------------------%
%%%%%%%%%%%% Section Labeling Setup %%%%%%%%%%%%
%----------------------------------------------%
\renewcommand{\thesection}{\arabic{section}}
\renewcommand{\thesubsection}{\thesection.\arabic{subsection}}
\renewcommand{\thesubsubsection}{\thesubsection.\arabic{subsubsection}}
\renewcommand{\thefootnote}{\roman{footnote}}
%----------------------------------------------%
    
%----------------------------------------------%
%%%%%%%%%%%%%%% Package Imports %%%%%%%%%%%%%%%%
%----------------------------------------------%
\usepackage{ifdraft}
\usepackage[]{graphicx}
\usepackage{dcolumn}
\usepackage{bm}
\usepackage{lipsum}
\usepackage[]{float}
\usepackage{placeins}
\usepackage[]{longtable}

%*****************************************  added <<<<<<<<<<<<<
\usepackage{tabularx}% table width
\usepackage{capt-of} % for caption of

\usepackage{tikz}
\usetikzlibrary{positioning}
\usetikzlibrary{tikzmark} % amrk the origin
\usetikzlibrary{calc}   
%----------------------------------------------%

 %\usepackage{showframe} % show the margins

%----------------------------------------------%
%%%%%%%%%%%%%%%% ToDo Notes Setup %%%%%%%%%%%%%%
%----------------------------------------------%
\usepackage[obeyDraft]{todonotes}
\makeatletter
\if@todonotes@disabled
\newcommand{\hlfix}[2]{#1}
\else
\newcommand{\hlfix}[2]{\texthl{#1}\todo[
    color=yellow,
    size=\tiny,
    ]{#2}}
\fi
\makeatother
%----------------------------------------------%

%----------------------------------------------%
%%%%%%%%%%%%%%% Versioning Setup %%%%%%%%%%%%%%%
%----------------------------------------------%
\usepackage{mVersion}
\setVersion{0.1}
\increaseBuild
\renewcommand{\version}{v\versionnumber \ifoptionfinal{}{(\thebuildcounter)}}
%----------------------------------------------%
        
%----------------------------------------------%
%%%%%%%%%% Document Name and ID Setup %%%%%%%%%%
%----------------------------------------------%
\newcommand{\DocTitle}{xxxxxxx xxxxx xxx xx-xxxx xxxxxxxxx xxxxxxx xx xxxxxxxxxx xxxx xxx x 1111}
\newcommand{\DocDivision}{xxxxx}
\newcommand{\DocGroup}{xxx}
\newcommand{\DocType}{xx}
\newcommand{\DocNumber}{001}
\newcommand{\VersionString}{\DocType -\DocNumber -\version}
\newcommand{\DocExt}{.pdf}
\newcommand{\FileName}{xx\_xxxxxxxxx\_xxxxxx\_xxxx2263\_\version\DocExt}
%----------------------------------------------%

%----------------------------------------------%
%%%%%%%%%%%%%%% Draftmark Setup %%%%%%%%%%%%%%%%
%----------------------------------------------%
\usepackage{tikz}
\usepackage{xcolor}
\newsavebox\wmbox
\savebox\wmbox{\tikz[
    color=red,
    opacity=0.15,
    ]%
    \node[
    rectangle,%
    draw=white,%
    ultra thick,%
    scale=7.7,%
    rotate=45,
    ]{DRAFT\version};}
\AddToHook{shipout/foreground}{\put(.5in, -.85\paperheight){\ifoptionfinal{}{\usebox\wmbox}}}
%----------------------------------------------%

%----------------------------------------------% 
%%%%%%%%%%%%%%% Hyperlink setup %%%%%%%%%%%%%%%%
%----------------------------------------------%
\usepackage{url}
\usepackage{hyperref}
\hypersetup{
    final,
    colorlinks=true, 
    linkcolor=blue,
    filecolor=magenta,      
    urlcolor=cyan,
    citecolor=blue,
    pdftitle={\DocTitle},
    pdfauthor={xxxx x. xxxxxxxx},
    pdfinfo={document version={\versionnumber},
        build number={\thebuildcounter}},
}
%----------------------------------------------%

%----------------------------------------------%
%%%%%%%%%%%%% Classification Setup %%%%%%%%%%%%%
%----------------------------------------------%
\newcommand{\INTERNAL}{\fcolorbox{black}{gray!15}{\makebox[\dimexpr\linewidth-2\fboxsep-2px][c]{FOR INTERNAL USE ONLY}}}%
\newcommand{\CONFIDENTIAL}{\fcolorbox{black}{red!25}{\makebox[\dimexpr\linewidth-2\fboxsep-2px][c]{CONFIDENTIAL}}}%
\newcommand{\SECRET}{\fcolorbox{black}{red!25}{\makebox[\dimexpr\linewidth-2\fboxsep-2px][c]{SECRET}}}%
\newcommand{\TOPSECRET}{\fcolorbox{black}{red}{\makebox[\dimexpr\linewidth-2\fboxsep-2px][c]{TOP SECRET}}}%
\newcommand{\ITARNF}{\fcolorbox{black}{red}{\makebox[\dimexpr\linewidth-2\fboxsep-2px][c]{ITAR-NOFORN}}}%
\newcommand{\UNCLASSIFIED}{\fcolorbox{black}{green!25}{\makebox[\dimexpr\linewidth-2\fboxsep-2px][c]{UNCLASSIFIED}}}
\newcommand{\UNRESTRICTED}{\fcolorbox{black}{green!25}{\makebox[\dimexpr\linewidth-2\fboxsep-2px][c]{UNRESTRICTED}}}
\newcommand{\classification}{\INTERNAL}
%----------------------------------------------%

%----------------------------------------------%
%%%%%%%%%%%%% Header/Footer Setup %%%%%%%%%%%%%%
%----------------------------------------------%
\usepackage{fancyhdr}
\pagestyle{fancy}
\fancyhf{}
\chead{\classification\\\FileName}
\lhead{\VersionString \ifoptionfinal{}{\ DRAFT}}
\rhead{\thepage$|$\pageref{LastPage}}
\cfoot{\classification}
\renewcommand{\footrulewidth}{\headrulewidth}
%----------------------------------------------%


%----------------------------------------------%
%%%%%%%%%%%%%%%% Newpage Setup %%%%%%%%%%%%%%%%%
%----------------------------------------------%
\makeatletter
\newcommand*{\balancecolsandclearpage}{%
    \close@column@grid
    \clearpage
    \twocolumngrid
}
\makeatother
%----------------------------------------------%

\newcommand{\AppTabi}{% first table <<<<<<<<<<<<<<
    \begin{ruledtabular}
      \begin{tabularx}{0.7\linewidth}{>{\hsize=.4\hsize}X X}
        xxxx & xxxxxxx\\ \hline
        xxxxxxxx xxxxxx xxxxxxx xxxxxx & xxxxxxxxx xxxxxxx xx xxxxxxx xxxx xxxxxx xxx xxxx.\\
        xxxxx xxxxxxx xxxxxxx xxxx & xxx xxxx xxxxxxxx xx xxx xxxxxxxxx xxxxxxxxxx xx xxx xxxxx xxxxxxx xxxxx xxx xxxxxxxxxxxx xxxx, xxxxx xxxxxxxx xxxxx xxx xxxxxxxx xxxxxxx xxx xxx xxxxxxxxxx, xxxx x xxxxx xxxxxxxxxxxxx xx xxx xxxxxxxxxxxx xxxx xx xxx xxxxxxx.\\
        xxxx & xxxxx xxxxxxxxx xx xxx xxxxxxxxxxxx xx xxx xxxxxxx xxxxxx xxxxxx xxxxxx xx x xxxxxx xxxxxxx.\\
        xxxxx xxxxx-xxxx xxxxx & xxx xxxxx-xxxx xxxxx xxxxx xxxxxxx xxxx 1111 xxx xxxx.\\
        xxxxx-xxxx xxxxxxx &  x xxxxxxxxx xxx xx xxxxxxxxx xxx xxxxxxxxxx xxxxxxx xx xxxxxxx 11 xxxxxxxxxx xx xxxx. \\
        xxxxx-xxxx xxxxx &  xxx xxxxx xxxxxxx xxxxx xx 1,111 xxxxxx xxxx xx xxxx xxxxx xxx x xxxxxxx xxxx xxxxxx xx 1,111 xxxxxx xx xxxx xxx xxxxx xxx x xxxxx xxxxxxx xxxxxxx xxxx xx 11 xxxxxx xxxx xx xxxx, xxxxx xx: (1) xxxxxxxx xxxxxxxxx xxx xxxxxxxx xx xxxxxxxxxxxxxx xx xxxxxxxx xx xx x xxxxxxxxxx xx xxxx x xxxxxxx, xx (1) xxxxxxxx xxxxxxxxx xxx xxxxxxxxxxxxxx xx xxxxxxx xxx xxx x xxxxxxxx xx xxxx xxxx 11 xxxxxxx, xx (1) xxxxxxxxx xxxx xxxxxxx xxxxxxxx xxxxxxxx xxx-xxxxxx xx xxx-xxxxxxx xxxxxxxxx xxx xxx. \\
        xxxxxx xxxxxxx xxxxxx & xxxxxxx xxxx xxxxxx xxxx 111 xxxxxx.\\
        xxxxxxx xxxx xxxxxx & xxxxxx xx xxxxxxxxxxxx'x xxxxxxxxx xxxxxx xx xxx xxxxxxx xx xxxxxxxxxxx xxxxxx xxxx xxx xxxxxxxx xxxxxxxxx, xxx xxxxxx xx xxxx xx xxxxxxx xxxx xxxxxxxx, xxx xxx xxxxxx xx xxxxxxxx xxxxxxxxx xxxxxxxx xx xxxxxxxxxx xxxx 11 xxx \S 11.111-11; xxxxxxxxxx xxxxx-xxxx xxxxxx xxxxx xxxx xxx xxxx xxxxxx xxxxxxxxx xx xxx xxxxxxxxxxxx.\\
    \end{tabularx}
\end{ruledtabular}      
}

\newcommand{\Capi}{% caption of the first table <<<<<<<<<<<<
\label{tab:68def}xxxxxxxxxx xxxx 11 xxx \S11 xxx xxx xx xxxxxxxx \ref{ap:etw}
}

\newcommand{\AppTabii}{% second table <<<<<<<<<<
    \begin{ruledtabular}
    \begin{tabularx}{0.7\linewidth}{X  >{\hsize=0.5\hsize}X}
        xxxxx & xxx\\ \hline
        Up to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 1111 & 1,111 \\
        1111 to 11111 & 11,111 \\
        11111 to 11111 & 11,111 \\
        11111 to 11111 & 11,111 \\
        11111 to 11111 & 11,111 \\
        11111 to 11111 & 11,111 \\
        11111 to 11111 & 11,111 \\
        11111 to 11111 & 11,111 \\
        11111 to 11111 & 11,111 \\
        11111 to 11111 & 11,111 \\      
    \end{tabularx}
\end{ruledtabular}      
}

\newcommand{\Capii}{% caption of the second table <<<<<<<
    \label{tab:etw}xxxxxxxxxx xxxx xxxxxx xxxxx xxxx 11 xxx \S 11.111-11, xxx xxx xx xxxxxxxx \ref{ap:etw}.
}


%----------------------------------------------%
%************** Begin Document ****************%
%----------------------------------------------%
\begin{document}
    \title[]{\DocTitle}
    %\thanks{Footnote to title of article.}
    
    \author{x.x. xxxxxxxx}
    \email{xxxxxxxx\[email protected]}
    \author{x. xxxxxx}
    \email{[email protected]}
    \affiliation{%
        \begin{minipage}{\textwidth}
            \vspace{0.5\baselineskip}
            xxx xxxxx xxxxxxx%\\
            %4554 xxxxxxxxx xx\\
            %xxxxxx xxxxx, xx 11111\\
            %xxxxxx xxxxxx
        \end{minipage}
    }
    
    \date{\today}
    
    \begin{abstract}
        xxxx xxxxxxxx xxxxxxxx xx xxxxxxxx xx xxx xxxxxxx xxxxxxxxxxx, xxxxxxx xxxxxxx, xxx xxxx xxxxxxxxxx xxxxxxxxxxxx xxx xxxxxxxxxx xxxxxxx xxxxxxxxx xxxxxxx xx xxxxxxxxxx xxxx xxx x 1111 xx x xxxxxxxxx xxxxxxxx. xxxxxxx xxx x 1111 xxx xxx xxxxxxxxxx xxxxxxxxx xxx xxxxxxxxxxx xxx xxxx xxxxxxx.
    \end{abstract}
    
    \keywords{xxxxxxx xxx xxxxxxxxxxx xxxxxxxxx}
    \maketitle
    \thispagestyle{fancy} %required for header and footer to appear on first page
    \lipsum[1-6]
    \balancecolsandclearpage
    
    \appendix
    \section{xxxxxxxxxx xxxx xxxxxx (xxx) xxxxxxxxxxxxx xxx 11 xxx \S11}\label{ap:etw}

    xxxxxxxxxx: 11 xxx \S 11.111-11, \S\S 1111.111-1111.111.
    
    xxx \emph{xxxxx-xxxx xxxxxxxx} xxxx x \emph{xxxxxx xxxxxxx xxxxxx} xx xxxx xxxx xx xxxxx xx 1,111 xxx, xxxx xxx \emph{xxxxxx xxxxxxx xxxxxx} xx xxx `xxxxx' xxxxxx xx xxxxx \ref{tab:etw}, xxx xxx xxx xxxxxxxxxxxxx xxxxx xxxx xxx `xxx' xxxxxx xx xxx 
    
    xxx xxxxx xxxx 1994 xxx xxxxx \emph{xxxxx xxxxx-xxxx xxxxxx} xxx xxxxxxx xx xxx xxxx 0 xxxxxxxxx xx 11 xxx \S 11.111–1, xxxx xxx \emph{xxxxxxxx xxxxxx xxxxxxx xxxxxx} xx xxx `xxxxx' xxxxxx xx xxxxx \ref{tab:etw}, xxx xxx xxx xxxxxxxxxxxxx xxxxx xxxx xxx `xxx' xxxxxx xx xxx xxxxxxxxxx xxxx xxxxxx.

    xxx xxxxx \ref{tab:68def} xxx xxxxxxxxxxx. End of two columns

\noindent\tikzmark{e}% mark added <<<<<<<<<<<

\begin{tikzpicture}[overlay,remember picture]
    % \draw[red] ( $ (pic cs:e) +(0mm,0mm) $ ) circle[radius=5pt]; % SHOW the origin (for debug)
    \node (Origin) at ( $ (pic cs:e) +(-0.5\linewidth-\columnsep,0.5\baselineskip) $) {};
    \node (tab1)[below=of Origin, text width=\linewidth] {\AppTabi};
    \node[inner sep=0pt,above=\belowcaptionskip of tab1,text width=\linewidth,yshift=-2mm]{\captionof{table}{\Capi}};
    \node [right=of tab1,xshift=-8mm,yshift=1mm, text width=\linewidth] (tab2)  {\AppTabii};    
    \node[inner sep=0pt,above=\belowcaptionskip of tab2,text width=\linewidth]  {\captionof{table}{\Capii}};
\end{tikzpicture}
    
\end{document}

更新后续问题之后。（对表定义进行微小修改，基本解决方案相同）

A

\documentclass[
aapm,
showkeys,
mph,
amsmath,
amssymb,
nofootinbib,
nobibnotes,
%preprint,
reprint,
%draft,
%final,
]{revtex4-2}


%----------------------------------------------%
%%%%%%%%%%%% Section Labeling Setup %%%%%%%%%%%%
%----------------------------------------------%
\renewcommand{\thesection}{\arabic{section}}
\renewcommand{\thesubsection}{\thesection.\arabic{subsection}}
\renewcommand{\thesubsubsection}{\thesubsection.\arabic{subsubsection}}
\renewcommand{\thefootnote}{\roman{footnote}}
%----------------------------------------------%

%----------------------------------------------%
%%%%%%%%%%%%%%% Package Imports %%%%%%%%%%%%%%%%
%----------------------------------------------%
\usepackage{ifdraft}
\usepackage[]{graphicx}
\usepackage{dcolumn}
\usepackage{bm}
\usepackage{lipsum}
\usepackage[]{float}
\usepackage{placeins}
\usepackage[]{longtable}

%*****************************************  added <<<<<<<<<<<<<
\usepackage{tabularx}% table width
\usepackage{capt-of} % for caption of

\usepackage{tikz}
\usetikzlibrary{positioning}
\usetikzlibrary{tikzmark} % amrk the origin
\usetikzlibrary{calc}   
%----------------------------------------------%

%\usepackage{showframe} % show the margins

%----------------------------------------------%
%%%%%%%%%%%%%%%% ToDo Notes Setup %%%%%%%%%%%%%%
%----------------------------------------------%
\usepackage[obeyDraft]{todonotes}
\makeatletter
\if@todonotes@disabled
\newcommand{\hlfix}[2]{#1}
\else
\newcommand{\hlfix}[2]{\texthl{#1}\todo[
    color=yellow,
    size=\tiny,
    ]{#2}}
\fi
\makeatother
%----------------------------------------------%

%----------------------------------------------%
%%%%%%%%%%%%%%% Versioning Setup %%%%%%%%%%%%%%%
%----------------------------------------------%
\usepackage{mVersion}
\setVersion{0.1}
\increaseBuild
\renewcommand{\version}{v\versionnumber \ifoptionfinal{}{(\thebuildcounter)}}
%----------------------------------------------%

%----------------------------------------------%
%%%%%%%%%% Document Name and ID Setup %%%%%%%%%%
%----------------------------------------------%
\newcommand{\DocTitle}{xxxxxxx xxxxx xxx xx-xxxx xxxxxxxxx xxxxxxx xx xxxxxxxxxx xxxx xxx x 1111}
\newcommand{\DocDivision}{xxxxx}
\newcommand{\DocGroup}{xxx}
\newcommand{\DocType}{xx}
\newcommand{\DocNumber}{001}
\newcommand{\VersionString}{\DocType -\DocNumber -\version}
\newcommand{\DocExt}{.pdf}
\newcommand{\FileName}{xx\_xxxxxxxxx\_xxxxxx\_xxxx2263\_\version\DocExt}
%----------------------------------------------%

%----------------------------------------------%
%%%%%%%%%%%%%%% Draftmark Setup %%%%%%%%%%%%%%%%
%----------------------------------------------%
\usepackage{tikz}
\usepackage{xcolor}
\newsavebox\wmbox
\savebox\wmbox{\tikz[
    color=red,
    opacity=0.15,
    ]%
    \node[
    rectangle,%
    draw=white,%
    ultra thick,%
    scale=7.7,%
    rotate=45,
    ]{DRAFT\version};}
\AddToHook{shipout/foreground}{\put(.5in, -.85\paperheight){\ifoptionfinal{}{\usebox\wmbox}}}
%----------------------------------------------%

%----------------------------------------------% 
%%%%%%%%%%%%%%% Hyperlink setup %%%%%%%%%%%%%%%%
%----------------------------------------------%
\usepackage{url}
\usepackage{hyperref}
\hypersetup{
    final,
    colorlinks=true, 
    linkcolor=blue,
    filecolor=magenta,      
    urlcolor=cyan,
    citecolor=blue,
    pdftitle={\DocTitle},
    pdfauthor={xxxx x. xxxxxxxx},
    pdfinfo={document version={\versionnumber},
        build number={\thebuildcounter}},
}
%----------------------------------------------%

%----------------------------------------------%
%%%%%%%%%%%%% Classification Setup %%%%%%%%%%%%%
%----------------------------------------------%
\newcommand{\INTERNAL}{\fcolorbox{black}{gray!15}{\makebox[\dimexpr\linewidth-2\fboxsep-2px][c]{FOR INTERNAL USE ONLY}}}%
\newcommand{\CONFIDENTIAL}{\fcolorbox{black}{red!25}{\makebox[\dimexpr\linewidth-2\fboxsep-2px][c]{CONFIDENTIAL}}}%
\newcommand{\SECRET}{\fcolorbox{black}{red!25}{\makebox[\dimexpr\linewidth-2\fboxsep-2px][c]{SECRET}}}%
\newcommand{\TOPSECRET}{\fcolorbox{black}{red}{\makebox[\dimexpr\linewidth-2\fboxsep-2px][c]{TOP SECRET}}}%
\newcommand{\ITARNF}{\fcolorbox{black}{red}{\makebox[\dimexpr\linewidth-2\fboxsep-2px][c]{ITAR-NOFORN}}}%
\newcommand{\UNCLASSIFIED}{\fcolorbox{black}{green!25}{\makebox[\dimexpr\linewidth-2\fboxsep-2px][c]{UNCLASSIFIED}}}
\newcommand{\UNRESTRICTED}{\fcolorbox{black}{green!25}{\makebox[\dimexpr\linewidth-2\fboxsep-2px][c]{UNRESTRICTED}}}
\newcommand{\classification}{\INTERNAL}
%----------------------------------------------%

%----------------------------------------------%
%%%%%%%%%%%%% Header/Footer Setup %%%%%%%%%%%%%%
%----------------------------------------------%
\usepackage{fancyhdr}
\pagestyle{fancy}
\fancyhf{}
\chead{\classification\\\FileName}
\lhead{\VersionString \ifoptionfinal{}{\ DRAFT}}
\rhead{\thepage$|$\pageref{LastPage}}
\cfoot{\classification}
\renewcommand{\footrulewidth}{\headrulewidth}
%----------------------------------------------%


%----------------------------------------------%
%%%%%%%%%%%%%%%% Newpage Setup %%%%%%%%%%%%%%%%%
%----------------------------------------------%
\makeatletter
\newcommand*{\balancecolsandclearpage}{%
    \close@column@grid
    \clearpage
    \twocolumngrid
}
\makeatother
%----------------------------------------------%

\newcommand{\AppTabi}{% first table <<<<<<<<<<<<<<
    \begin{ruledtabular}\small
        \begin{tabularx}{\columnwidth}{>{\hsize=.3\hsize}X >{\hsize=.65\hsize}X}
            xxxx & xxxxxxx\\ \hline
            xxxxxxxx xxxxxx xxxxxxx xxxxxx & xxxxxxxxx xxxxxxx xx xxxxxxx xxxx xxxxxx xxx xxxx.\\
            xxxxx xxxxxxx xxxxxxx xxxx & xxx xxxx xxxxxxxx xx xxx xxxxxxxxx xxxxxxxxxx xx xxx xxxxx xxxxxxx xxxxx xxx xxxxxxxxxxxx xxxx, xxxxx xxxxxxxx xxxxx xxx xxxxxxxx xxxxxxx xxx xxx xxxxxxxxxx, xxxx x xxxxx xxxxxxxxxxxxx xx xxx xxxxxxxxxxxx xxxx xx xxx xxxxxxx.\\
            xxxx & xxxxx xxxxxxxxx xx xxx xxxxxxxxxxxx xx xxx xxxxxxx xxxxxx xxxxxx xxxxxx xx x xxxxxx xxxxxxx.\\
            xxxxx xxxxx-xxxx xxxxx & xxx xxxxx-xxxx xxxxx xxxxx xxxxxxx xxxx 1111 xxx xxxx.\\
            xxxxx-xxxx xxxxxxx &  x xxxxxxxxx xxx xx xxxxxxxxx xxx xxxxxxxxxx xxxxxxx xx xxxxxxx 11 xxxxxxxxxx xx xxxx. \\
            xxxxx-xxxx xxxxx &  xxx xxxxx xxxxxxx xxxxx xx 1,111 xxxxxx xxxx xx xxxx xxxxx xxx x xxxxxxx xxxx xxxxxx xx 1,111 xxxxxx xx xxxx xxx xxxxx xxx x xxxxx xxxxxxx xxxxxxx xxxx xx 11 xxxxxx xxxx xx xxxx, xxxxx xx: (1) xxxxxxxx xxxxxxxxx xxx xxxxxxxx xx xxxxxxxxxxxxxx xx xxxxxxxx xx xx x xxxxxxxxxx xx xxxx x xxxxxxx, xx (1) xxxxxxxx xxxxxxxxx xxx xxxxxxxxxxxxxx xx xxxxxxx xxx xxx x xxxxxxxx xx xxxx xxxx 11 xxxxxxx, xx (1) xxxxxxxxx xxxx xxxxxxx xxxxxxxx xxxxxxxx xxx-xxxxxx xx xxx-xxxxxxx xxxxxxxxx xxx xxx. \\
            xxxxxx xxxxxxx xxxxxx & xxxxxxx xxxx xxxxxx xxxx 111 xxxxxx.\\
            xxxxxxx xxxx xxxxxx & xxxxxx xx xxxxxxxxxxxx'x xxxxxxxxx xxxxxx xx xxx xxxxxxx xx xxxxxxxxxxx xxxxxx xxxx xxx xxxxxxxx xxxxxxxxx, xxx xxxxxx xx xxxx xx xxxxxxx xxxx xxxxxxxx, xxx xxx xxxxxx xx xxxxxxxx xxxxxxxxx xxxxxxxx xx xxxxxxxxxx xxxx 11 xxx \S 11.111-11; xxxxxxxxxx xxxxx-xxxx xxxxxx xxxxx xxxx xxx xxxx xxxxxx xxxxxxxxx xx xxx xxxxxxxxxxxx.\\
        \end{tabularx}
    \end{ruledtabular}      
}

\newcommand{\Capi}{% caption of the first table <<<<<<<<<<<<
    \label{tab:68def}xxxxxxxxxx xxxx 11 xxx \S11 xxx xxx xx xxxxxxxx \ref{ap:etw}
}

\newcommand{\AppTabii}{% second table <<<<<<<<<<
    \newcolumntype{Y}{>{\centering\arraybackslash}X}
    \begin{ruledtabular}\small
        \begin{tabularx}{\columnwidth}{>{\hsize=0.3\hsize}Y  >{\hsize=0.2\hsize}Y}
            xxxxx & xxx\\ \hline
            Up to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 1111 & 1,111 \\
            1111 to 11111 & 11,111 \\
            11111 to 11111 & 11,111 \\
            11111 to 11111 & 11,111 \\
            11111 to 11111 & 11,111 \\
            11111 to 11111 & 11,111 \\
            11111 to 11111 & 11,111 \\
            11111 to 11111 & 11,111 \\
            11111 to 11111 & 11,111 \\
            11111 to 11111 & 11,111 \\      
        \end{tabularx}
    \end{ruledtabular}      
}

\newcommand{\Capii}{% caption of the second table <<<<<<<
    \label{tab:etw}xxxxxxxxxx xxxx xxxxxx xxxxx xxxx 11 xxx \S 11.111-11, xxx xxx xx xxxxxxxx \ref{ap:etw}.
}


%----------------------------------------------%
%************** Begin Document ****************%
%----------------------------------------------%
\begin{document}
    \title[]{\DocTitle}
    %\thanks{Footnote to title of article.}
    
    \author{x.x. xxxxxxxx}
    \email{xxxxxxxx\[email protected]}
    \author{x. xxxxxx}
    \email{[email protected]}
    \affiliation{%
        \begin{minipage}{\textwidth}
            \vspace{0.5\baselineskip}
            xxx xxxxx xxxxxxx%\\
            %4554 xxxxxxxxx xx\\
            %xxxxxx xxxxx, xx 11111\\
            %xxxxxx xxxxxx
        \end{minipage}
    }
    
    \date{\today}
    
    \begin{abstract}
        xxxx xxxxxxxx xxxxxxxx xx xxxxxxxx xx xxx xxxxxxx xxxxxxxxxxx, xxxxxxx xxxxxxx, xxx xxxx xxxxxxxxxx xxxxxxxxxxxx xxx xxxxxxxxxx xxxxxxx xxxxxxxxx xxxxxxx xx xxxxxxxxxx xxxx xxx x 1111 xx x xxxxxxxxx xxxxxxxx. xxxxxxx xxx x 1111 xxx xxx xxxxxxxxxx xxxxxxxxx xxx xxxxxxxxxxx xxx xxxx xxxxxxx.
    \end{abstract}
    
    \keywords{xxxxxxx xxx xxxxxxxxxxx xxxxxxxxx}
    \maketitle
    \thispagestyle{fancy} %required for header and footer to appear on first page
    \lipsum[1-6]
    \balancecolsandclearpage
    
    \appendix
    \section{xxxxxxxxxx xxxx xxxxxx (xxx) xxxxxxxxxxxxx xxx 11 xxx \S11}\label{ap:etw}
    
    xxxxxxxxxx: 11 xxx \S 11.111-11, \S\S 1111.111-1111.111.
    
    xxx \emph{xxxxx-xxxx xxxxxxxx} xxxx x \emph{xxxxxx xxxxxxx xxxxxx} xx xxxx xxxx xx xxxxx xx 1,111 xxx, xxxx xxx \emph{xxxxxx xxxxxxx xxxxxx} xx xxx `xxxxx' xxxxxx xx xxxxx \ref{tab:etw}, xxx xxx xxx xxxxxxxxxxxxx xxxxx xxxx xxx `xxx' xxxxxx xx xxx 
    
    xxx xxxxx xxxx 1994 xxx xxxxx \emph{xxxxx xxxxx-xxxx xxxxxx} xxx xxxxxxx xx xxx xxxx 0 xxxxxxxxx xx 11 xxx \S 11.111–1, xxxx xxx \emph{xxxxxxxx xxxxxx xxxxxxx xxxxxx} xx xxx `xxxxx' xxxxxx xx xxxxx \ref{tab:etw}, xxx xxx xxx xxxxxxxxxxxxx xxxxx xxxx xxx `xxx' xxxxxx xx xxx xxxxxxxxxx xxxx xxxxxx.
    
    xxx xxxxx \ref{tab:68def} xxx xxxxxxxxxxx. End of two columns
    
    \noindent\tikzmark{e}% mark added <<<<<<<<<<<
    
    \begin{tikzpicture}[overlay,remember picture]
         %\draw[red] ( $ (pic cs:e) +(0mm,0mm) $ ) circle[radius=5pt]; % SHOW the origin (for debug)
        \node (Origin) at ( $ (pic cs:e) +(-0.5\linewidth-\columnsep,0.5\baselineskip) $) {};
        \node (tab1)[below=of Origin, text width=\columnwidth] {\AppTabi};
        \node[inner sep=0pt,above=\belowcaptionskip of tab1,text width=\columnwidth,yshift=-1mm]{\captionof{table}{\Capi}};
        \node [right=of tab1, text width=\columnwidth ,xshift=-6mm,yshift=-6mm,] (tab2)  {\AppTabii};    
        \node[inner sep=0pt,above=\belowcaptionskip of tab2,text width=\columnwidth]  {\captionof{table}{\Capii}};
    \end{tikzpicture}
    
\end{document}

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