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\section{研究背景}
请大声歌唱数学学院院歌：
\begin{theorem}
黄风岭，八百里，曾是关外富饶地，一朝鼠患凭空起，乌烟瘴气渺人迹，曼波 : |
无父无君无法纪，为非作歹有天庇，幸得大圣借佛力，邪风一时偃旌旗，Duang\~{}
哪知不测奇祸起旦夕,那黄毛孽畜再回籍,哦!
凶犯不死好得意,福星横尸却成谜,噔!噔!噔!噔!噔!掖\~{} 噔!噔!噔!噔!掖\~{}噔!噔!噔! \hspace{1cm}噔!掖\~{}\~{}
\end{theorem}
\begin{proof}
通过美国TGA投票反证易知，以上成立。其他细节留给读者做为练习 可参考 \cite{Blackmyth} 以及 \cite{manbo}, BV1ef421i7mm.
\end{proof}
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