请问，为什么前两条垂直线延伸得太长了？
\documentclass{article}
\usepackage{array}
\usepackage{multirow}
\usepackage{tabularx, makecell, boldline}
\usepackage[tagged, highstructure]{accessibility}
\usepackage{hyperref}
\hypersetup{
pdflang={en-GB},
pdftitle={Teaching Shedule},
pdfauthor={Dr },
pdfsubject={Mathematics},
pdfkeywords={Accessibility, LaTeX},
colorlinks=true,
linkcolor=blue,
filecolor=magenta,
urlcolor=cyan,
}
\usepackage{tagging}
\title{\vspace{-3.0cm}\textbf{\huge{Mathematics 1} \\ \textbf{\large{Approximate Weekly Teaching Schedule}}}}
\author{}
\date{}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{document}
\maketitle
\vspace{-10mm}
For approximate teaching schedule see also ...
\vspace{10mm}
\begin{tabular}{ V{4} c|c|c|c V{4} }
\Xhline{4\arrayrulewidth}
\makecell{\textbf{Trimester and} \\ \textbf{ Week Number}} & \textbf{Topic} & \textbf{Exrecise} & \textbf{Coursework} \\
\Xhline{4\arrayrulewidth}
Tri-A W01 & Algebra & 1-7 p.12-15 & \\
\hline
Tri-A W02 & Algebra & \makecell{1-9 p.28-31; \\ 4.6 p.43} & \\
\hline
Tri-A W03 & Functions & 1-3 p.58 & \\
\hline
Tri-A W04 & Functions & \makecell{3-5 p.58-59; \\ 1-3 p.86} & \makecell{Approximately \\ Test 1 Issued} \\
\hline
Tri-A W05 & Functions & 4-6 p.87 & \\
\hline
Tri-A W06 & Logarithmic Scale & 7-14 p.87-88 & \\
\hline
Tri-A W07 & Complex Numbers & 1-7 p.119-121 & \\
\hline
Tri-A W08 & Complex Numbers & 8-28 p.121-124 & \makecell{Approximately \\ Test 2 Issued} \\
\hline
Tri-A W09 & Trigonometry & 1-7 p.167-169 & \\
\hline
Tri-A W10 & Trigonometry & 8-9 p.169-170 & \\
\hline
Tri-A W11 & Trigonometry & 9-11 p.170-171 & \makecell{Approximately \\ Test 3 Issued} \\
\hline
Tri-A W12 & Matrix Algebra & 1-9 p.185-189 & \\
\Xhline{4\arrayrulewidth}
Tri-B W01 & Vectors & 1-9 p.22-23 & \\
\hline
Tri-B W02 & Vectors & 11-38 p.23-27 & \\
\hline
Tri-B W03 & Differentiation & 1-12 p.52-55 & \\
\hline
Tri-B W04 & Differentiation & 1-12 p.52-55 & \\
\hline
Tri-B W05 & Differentiation & 1-12 p.52-55 & \\
\hline
Tri-B W06 & Differentiation & 1-12 p.52-55 & \makecell{Approximately \\ Test 4 Issued} \\
\hline
Tri-B W07 & Integration & 1-7 p.92-94 & \\
\hline
Tri-B W08 & Integration & 1-7 p.92-94 & \\
\hline
Tri-B W09 & Integration & 1-7 p.92-94 & \\
\hline
Tri-B W10 & Integration & 1-7 p.92-94 & \\
\hline
Tri-B W11 & Numerical Methods & 1-7 p.107-108 & \\
\hline
Tri-B W12 & Revision for Exam & & \\
\Xhline{4\arrayrulewidth}
\end{tabular}
\vspace{1mm}
\subsubsection*{ RD $ 2023 $}
\end{document}
答案1
我把你的代码简化为最小工作示例（MWE）。
tagged如果您从包中删除该选项，accessibility它将正常工作。因此，此选项似乎会导致不良副作用。如果您需要它，您可以查看文档。如果没有解决方案，您可以在相关的 GitHub 页面上创建一个问题。
平均能量损失
\documentclass{article}
\usepackage[tagged, highstructure]{accessibility}
\begin{document}
\begin{tabular}{ c|c }
a & b \\
\end{tabular}
\end{document}
无 MWEtagged
\documentclass{article}
\usepackage[highstructure]{accessibility}
\begin{document}
\begin{tabular}{ c|c }
a & b \\
\end{tabular}
\end{document}
答案2
你可以保留该tagged选项，但是写：
a & b
或者
a & b\par