问题：章节引用\ref{}不显示
解决办法：在前言部分添加：\setcounter{secnumdepth}{1}
Reference:
Latex Problem: Package epstopdf Warning: Drivers other than `pdftex' and `luatex' are not supported.
原文：https://www.cnblogs.com/lemonzhang/p/12158885.html
