如何改变描述环境内的标签和描述的对齐方式？

Question

我喜欢一个特定的描述对齐：

• 标签右对齐
• 描述左对齐

我LaTeX一直都是手动操作，所以我想配置description环境来执行此操作。有人能给点建议吗？

\documentclass{article} 
\usepackage{enumitem}

\begin{document}

I'd like a description alignment like this:

\begin{tabular}{rl}
\textbf{E1:} & Example item 1 \\
\textbf{Long E2:} & Example item 2 \\
\textbf{Long long E3:} & Example item 3 \\
\end{tabular}

How to do it with description environment
or enumitem settings?

\end{document} 

Answer 1

enumitem以下是使用 和的解决方案calc：

\documentclass{article}
\usepackage[showframe]{geometry}
\usepackage{enumitem, calc}

\begin{document}

I'd like a description alignment like this:

\begin{tabular}{rl}
\textbf{E1:} & Example item 1 \\
\textbf{Long E2:} & Example item 2 \\
\textbf{Long long E3:} & Example item 3 \\
\end{tabular}

How to do it with description environment
or enumitem settings?

\begin{description}[labelwidth= \widthof{\bfseries Long long E3:}, align =right]%
 \item[E1:] Example item 1
 \item[Long E2:] Example item 2
 \item[Long long E3:] Example item 3
\end{description}

\end{document}