我必须设置什么才能让 xlabel 准确地位于图表的中间?
\documentclass[]{book}
\usepackage{pgfplots}
\begin{document}
\begin{tikzpicture}[font=\footnotesize]
\begin{axis}[
xlabel={This is the x-label},
xlabel style={fill=yellow,
at={([shift={(xticklabel* cs:0.5)}]yticklabel* cs:0.5)},
},
]
\end{axis}
\end{tikzpicture}
\end{document}