D:\Anaconda\.conda\envs\pytorch\Lib\site-packages\notebook\static\custom下面的custom.css
/*
Placeholder for custom user CSS
mainly to be overridden in profile/static/custom/custom.css
This will always be an empty file
*/
span.cm-comment {font-family: Monaco !important; font-style:normal !important; color:#FFAE3C !important;}
修改过后顺眼多了~~~~
参考：
jupyter notebook中显示字体如何调整？ - 李懿虎的回答 - 知乎 https://www.zhihu.com/question/40012144/answer/124731496