报错这种乱七八糟的错误
\abx@aux@segm {0}{0}{ref2} The control sequence at the end of the top line of your error message was never \def'ed. If you have misspelled it (e.g., \hobx'), type I' and the correct spelling (e.g., I\hbox'). Otherwise just continue, and I'll forget about whatever was undefined.
搜了一圈发现是因为先使用了biblatex，再换回传统的bibtex，出现了辅助文件污染的问题。

✅ 在 Overleaf 上清理方法：

1. 点击 Overleaf 顶部菜单栏的：Logs and output files

2. 点击 Clear compiled files

3. 然后重新点击 Recompile
解决了，看了一下午的问题竟然是这样啊