撰写毕业论文文件包括一个主文件main.tex以及多个由独立章节构成的子文件chapter01.tex chapter02.tex等，用sublime Text3编译main.tex时完全没有任何问题，但编译子文件chapter02时报错，代码如下： C:\Users\aogu2\Desktop\nwafuthesis-2.2.14\nwafuthesis-2.2.14\demo\contents\chap02.tex:4: Undefined control sequence. [\chapter] C:\Users\aogu2\Desktop\nwafuthesis-2.2.14\nwafuthesis-2.2.14\demo\contents\chap02.tex:4: LaTeX Error: Missing \begin{document}. [\chapter{材] C:\Users\aogu2\Desktop\nwafuthesis-2.2.14\nwafuthesis-2.2.14\demo\contents\chap02.tex:6: Undefined control sequence. [\section] C:\Users\aogu2\Desktop\nwafuthesis-2.2.14\nwafuthesis-2.2.14\demo\contents\chap02.tex:6: LaTeX Error: Missing \begin{document}. [\section{试] C:\Users\aogu2\Desktop\nwafuthesis-2.2.14\nwafuthesis-2.2.14\demo\contents\chap02.tex:8: Undefined control sequence. [\section] C:\Users\aogu2\Desktop\nwafuthesis-2.2.14\nwafuthesis-2.2.14\demo\contents\chap02.tex:10: Undefined control sequence. [\section] C:\Users\aogu2\Desktop\nwafuthesis-2.2.14\nwafuthesis-2.2.14\demo\contents\chap02.tex:12: Undefined control sequence. [\section] C:\Users\aogu2\Desktop\nwafuthesis-2.2.14\nwafuthesis-2.2.14\demo\contents\chap02.tex:15: Undefined control sequence. 我之前一直用的TexStudio写的，没有任何问题，听说sublime Text在插入文献的时候的自动补全功能比前者更好用，就来试试sublime Text，结果遇到如此问题，请各位大神解答，感激不尽！