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在 tabularx 中使用 \multicolumn 时出现缩进和边距问题

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在 tabularx 中使用 \multicolumn 时出现缩进和边距问题

我想使用 tabularx 格式化某些内容，其中第一行有一列从左边距开始，另一列从右边距开始，并且接下来的行只有一列跨越整个文本宽度，允许在文本中换行。以下是我的代码：

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage{multicol}
\usepackage{tabularx}

\begin{document}  
\section{Introduction}

\begin{flushleft}
    \begin{tabularx}{\textwidth}{@{}X @{\extracolsep{\fill}} r @{}}
         Text beginning at left margin & Something at right margin   \\
         \hline
          Here is some text that can get longer and longer until it causes a linebreak eventually & \\
         \textit{Some closing text that would go to the next line soon because of the cell to the right} & \\
    \end{tabularx}
\end{flushleft}


\begin{flushleft}
    \begin{tabularx}{\textwidth}{@{}X @{\extracolsep{\fill}} r @{}}
         Text beginning at left margin & Something at right margin  \\
         \hline
         \multicolumn{2}{p{\textwidth}}{Here is some longer sentence that goes past the original column on the right } \\
         \multicolumn{2}{p{\textwidth}}{\textit{Here is some text that can get longer and longer and longer and longer and longer until it causes a linebreak eventually}} \\
    \end{tabularx}
\end{flushleft}

\end{document}

在下图中，顶部看起来符合预期，但是底部两行的列没有合并。当我尝试使用底部代码执行此操作时，我首先注意到第二行和第三行的缩进。这是来自多列命令吗？我如何修改缩进？此外，当使用 \textwidth 作为 p 列的宽度时，这些行中的文本超出了右页边距。如果我的长度等于纸张宽度减去页边距，它就可以正常工作。这是怎么回事？此外，我很高兴有其他格式建议。在此处输入图片描述

答案1

您可以使用@{}来删除表格单元格左侧和右侧的小（6 pt）水平空白，就像您在表格代码中所做的那样。由于该\multicolumn命令覆盖了此设置，因此会重新添加填充，从而导致 ap 类型的列与\textwidth+2\tabcolsep此一样宽，并且会延伸到右边距。要解决此问题，请按照以下示例所示添加@{}到\multicolumn命令中。我还删除了，@{\extracolsep{\fill}}因为这里不需要此命令。

在以下屏幕截图中，红线表示页边距：

在此处输入图片描述

\documentclass{article}
%\usepackage[utf8]{inputenc} % default in an up to date installation
%\usepackage{multicol} % Not related to the \multicolumn command
\usepackage{tabularx}

\begin{document}  
\section{Introduction}

\noindent
    \begin{tabularx}{\textwidth}{@{} X r @{}}
         Text beginning at left margin & Something at right margin  \\
         \hline
         \multicolumn{2}{@{}p{\textwidth}@{}}{Here is some longer sentence that goes past the original column on the right } \\
         \multicolumn{2}{@{}p{\textwidth}@{}}{\textit{Here is some text that can get longer and longer and longer and longer and longer until it causes a linebreak eventually}} \\
    \end{tabularx}

\end{document}

答案2

从 - https://latex.org/forum/viewtopic.php?t=8352

在此处输入图片描述

\multicolumn{2}{@{}p{\textwidth}}{Here is some longer sentence that goes past the 
 original column on the right } \\

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