答案1
正如@Too Fat 所建议的,以下是我发现的tcolorbox
\begin{tcolorbox}
[arc=0mm,outer arc=0mm,
boxrule=0mm,toprule=0.5mm,bottomrule=0.5mm,left=0mm,right=0mm,leftrule=0pt,
titlerule=0mm,toptitle=0mm,bottomtitle=0mm,top=0mm,
colframe=gray!50,colback=green!5!white,coltitle=blue!50!black]
\textcolor{blue}{\textbf{EXEMPLE 1}}\\
Some texts .....
\end{tcolorbox}
这给予
谢谢你们。