我输入了太多空格，导致值无法保持对齐，溢出到边距中。我需要做什么来解决这个问题？
\documentclass[12pt,notitlepage]{article}
\usepackage[margin=2cm]{geometry}
\usepackage{booktabs} % For better looking tables
\usepackage{natbib}
\usepackage{amsmath}
\usepackage{lmodern}
\usepackage[utf8]{inputenc}
\usepackage{enumitem}
\usepackage[T1]{fontenc}
\usepackage[english]{babel}
\usepackage{graphicx}
\usepackage{amssymb}
\usepackage{mathtools}
\usepackage{array}
\usepackage[english]{babel}
\usepackage{siunitx}
\usepackage{sub caption}
\usepackage{dcolumn}
\newcolumntype{d}[1]{D..{#1}}
\newcommand\mc[1]{\multicolumn{1}{c}{#1}} % handy shortcut macro
\begin{document}
\begin{table}[ht!]
\small
\captionsetup{font={small,bf}}
% We use 'tabular*' to auto-determine intercolumn whitespace:
\setlength\tabcolsep{0pt}
\caption{Descriptive statistics}
\begin{tabular*}{\textwidth}{l @{\extracolsep{\fill}}d{1.0} d{1.0} *{4}{d{2.0}} d{1.0} d{1.0} *{5}{d{1.0}} }
\multicolumn{5}{l}{Panel A. Sub-sample: Descriptive statistics} \\
\toprule
& \multicolumn{6}{c}{Before Covid-19 outbreak} & \multicolumn{7}{c}{After Covid-19 outbreak}
\\
\cmidrule{2-7} \cmidrule{8-14}
& \mc{No of obs} & \mc{Mean} & \mc{Min} & \mc{Max} & \mc{Std.\ Dev.} &
& \mc{No of obs} & \mc{Mean} & \mc{Min} & \mc{Max} & \mc{Std.\ Dev} & \\
\midrule
Price & 2853 & 75.22 & 26.21 & 145.29 & 23.88 & & 549 & 54.04 & -37.63 & 84.65 & 17.01 \\
Open & 2853 & 75.25 & 27.30 & 145.19& 23.85 & & 549 & 54.05 & -14.00 & 84.53 & 16.77 \\
High & 2853 & 76.32 & 27.48 & 147.27& 24.01 & & 549 & 55.10 & 13.69 & 85.41 & 16.54 \\
Low & 2853 & 74.07 & 26.05 & 143.22 &23.66 & & 549 & 52.91 & -40.32 & 83.39 & 17.21 \\
\bottomrule
\end{tabular*}
\bigskip
\begin{tabular*}{\textwidth}{l@{\extracolsep{\fill}} *{8}{d{2.3}} *{2}{d{1.3}}}
\multicolumn{6}{l}{Panel B. Dickey-Fuller Test} \\
\toprule
& \mc{Test Statistic} & \mc{($p$-value)} & \mc{Lags} & \mc{No of obs} & \mc{ (1\%)} & \mc{ (5\%)} & \mc{(10\%)} &
\mc{D-type: float} \\
\midrule
Price & 0.216 & (0.366) & 2853 & 0.094 & 0.865 & -0.234 & -0.164 &Yes \\
\bottomrule
\end{tabular*}
\bigskip
Here's a description for the table
\end{table}
\end{document}
我当前的输出：
答案1
以下代码使用常规tabular，通过设置数字元素siunits' S-列规范，而不是使用dcolumn。使用标准\tabcolsep，两者都tabulars适合您指定的边距
\documentclass{article}
\usepackage[margin=2cm,showframe]{geometry}
\usepackage{booktabs} % For better looking tables
\usepackage{caption}
\usepackage{siunitx}
\newcommand\mc[1]{\multicolumn{1}{c}{#1}} % handy shortcut macro
\begin{document}
\begin{table}
\small
\begingroup\centering
\captionsetup{font={small,bf}}
\caption{Descriptive statistics}
%\setlength{\tabcolsep}{0.5\tabcolsep}% Shrink \tabcolsep by 50%
\begin{tabular}{
l % Description
% Before Covid-19 outbreak
S[table-format=4.0] % No of obs
S[table-format=2.2] % Mean
S[table-format=2.2] % Min
S[table-format=3.2] % Max
S[table-format=2.2] % Std Dev
% After Covid-19 outbreak
S[table-format=3.0] % No of obs
S[table-format=2.2] % Mean
S[table-format=-2.2] % Min
S[table-format=2.2] % Max
S[table-format=2.2] % Std Dev
}
\multicolumn{11}{l}{Panel A. Sub-sample: Descriptive statistics} \\
\toprule
& \multicolumn{5}{c}{Before Covid-19 outbreak} & \multicolumn{5}{c}{After Covid-19 outbreak} \\
\cmidrule(lr){2-6} \cmidrule(lr){7-11}
& \mc{Obs} & \mc{Mean} & \mc{Min} & \mc{Max} & \mc{Std.\ Dev.} &
\mc{Obs} & \mc{Mean} & \mc{Min} & \mc{Max} & \mc{Std.\ Dev.} \\
\midrule
Price & 2853 & 75.22 & 26.21 & 145.29 & 23.88 & 549 & 54.04 & -37.63 & 84.65 & 17.01 \\
Open & 2853 & 75.25 & 27.30 & 145.19 & 23.85 & 549 & 54.05 & -14.00 & 84.53 & 16.77 \\
High & 2853 & 76.32 & 27.48 & 147.27 & 24.01 & 549 & 55.10 & 13.69 & 85.41 & 16.54 \\
Low & 2853 & 74.07 & 26.05 & 143.22 & 23.66 & 549 & 52.91 & -40.32 & 83.39 & 17.21 \\
\bottomrule
\end{tabular}
\bigskip
\begin{tabular}{ l *{8}{c} }
\multicolumn{9}{l}{Panel B. Dickey-Fuller Test} \\
\toprule
& \mc{Test Statistic} & \mc{($p$-value)} & \mc{Lags} & \mc{No of obs} & \mc{ (1\%)} & \mc{ (5\%)} & \mc{(10\%)} & \mc{D-type: float} \\
\midrule
Price & $0.216$ & $(0.366)$ & $2853$ & $0.094$ & $0.865$ & $-0.234$ & $-0.164$ & Yes \\
\bottomrule
\end{tabular}
\bigskip
\endgroup
Here's a description for the table
\end{table}
\end{document}