如何“缩短” \cline 以便表中的多个组可见？

Question

我想构建一个看起来像booktabs表格的表格（但不使用包booktabs）。\cmidrule我没有使用\cline，而是使用了，它非常接近（见下文），但用绘制的线条\cline太宽，以至于它们相接……因此眼睛很难确定组的开始/结束位置。有解决方案吗？（不使用其他包）。

\documentclass{scrartcl}

\usepackage[T1]{fontenc}
\usepackage{lmodern}
\usepackage[american]{babel}
\usepackage{tabularx}
\usepackage{booktabs}
\usepackage[table]{xcolor}

\begin{document}

% my trial with \cline
\begin{table}[htbp]
  \centering
  \begin{tabular}{rrrrrrrrr}
    \hline
    Sex & \multicolumn{4}{c}{Male} & \multicolumn{4}{c}{Female} \\
    \cline{2-5} \cline{6-9}
    Age & \multicolumn{2}{c}{Child} & \multicolumn{2}{c}{Adult} & \multicolumn{2}{c}{Child} & \multicolumn{2}{c}{Adult} \\
    \cline{2-3} \cline{4-5} \cline{6-7} \cline{8-9}
    {Class \ Survived} & {No} & {Yes} & {No} & {Yes} & {No} & {Yes} & {No} & {Yes} \\
    \hline
    1st & 0 & 5 & 118 & 57 & 0 & 1 & 4 & 140 \\
    2nd & 0 & 11 & 154 & 14 & 0 & 13 & 13 & 80 \\
    3rd & 35 & 13 & 387 & 75 & 17 & 14 & 89 & 76 \\
    Crew & 0 & 0 & 670 & 192 & 0 & 0 & 3 & 20 \\
    \hline
  \end{tabular}
\end{table}

% with booktabs
\begin{table}[htbp]
  \centering
  \begin{tabular}{rrrrrrrrr}
    \toprule
    Sex & \multicolumn{4}{c}{Male} & \multicolumn{4}{c}{Female} \\
    \cmidrule(lr){2-5} \cmidrule(lr){6-9}
    Age & \multicolumn{2}{c}{Child} & \multicolumn{2}{c}{Adult} & \multicolumn{2}{c}{Child} & \multicolumn{2}{c}{Adult} \\
    \cmidrule(lr){2-3} \cmidrule(lr){4-5} \cmidrule(lr){6-7} \cmidrule(lr){8-9}
    {Class \ Survived} & {No} & {Yes} & {No} & {Yes} & {No} & {Yes} & {No} & {Yes} \\
    \midrule
    1st & 0 & 5 & 118 & 57 & 0 & 1 & 4 & 140 \\
    2nd & 0 & 11 & 154 & 14 & 0 & 13 & 13 & 80 \\
    3rd & 35 & 13 & 387 & 75 & 17 & 14 & 89 & 76 \\
    Crew & 0 & 0 & 670 & 192 & 0 & 0 & 3 & 20 \\
    \bottomrule
  \end{tabular}
\end{table}

\end{document}

Answer 1

  \begin{tabular}{@{\extracolsep{4pt}}rrrrrrrrr@{}}