如何删除 longtblr 的顶部和底部的空格？

Question

类似地如何删除 longtable 顶部和底部的空格？，我想知道如何删除 longtblr 的顶部和底部空格，即文本（前后）和 longtblr 之间的空格（除非\vspace*{-\baselineskip}或类似的东西是唯一的方法）。这是我的 MWE：

\documentclass{article}
\usepackage[a4paper,margin=0.1cm]{geometry} 
\usepackage{tabularray}
\usepackage{lipsum}


\begin{document}

\lipsum[1]

\DefTblrTemplate{firsthead, middlehead,lasthead}{default}{}
\begin{longtblr}{ colspec = {|X|X|},hlines}
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
\end{longtblr}

\lipsum[1]

\end{document}

我尝试了与上述与“longtable”相关的问题相同的解决方法，即添加\setlength{\LTpre}{0pt} \setlength{\LTpost}{0pt}，但它不起作用并且我收到错误Undefined control sequence：

\documentclass{article}
\usepackage[a4paper,margin=0.1cm]{geometry} 
\usepackage{tabularray}
\usepackage{lipsum}


\begin{document}

\lipsum[1]

\setlength{\LTpre}{0pt}
\setlength{\LTpost}{0pt}
\DefTblrTemplate{firsthead, middlehead,lasthead}{default}{}
\begin{longtblr}{ colspec = {|X|X|},hlines}
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
\end{longtblr}

\lipsum[1]

\end{document}

Answer 1

您可以使用presep和postsep选项来更改上方和下方的空间longtblr：

\documentclass{article}
\usepackage[a4paper,margin=0.1cm]{geometry} 
\usepackage{tabularray}
\usepackage{lipsum}


\begin{document}

\lipsum[1]

\DefTblrTemplate{firsthead, middlehead,lasthead}{default}{}
\begin{longtblr}[presep=0pt,postsep=0pt]{ colspec = {|X|X|},hlines}
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
First variable & Second variable \\
\end{longtblr}

\lipsum[1]

\end{document}