Fail to handle xlsx by using Astrogrep.
So here it is.

A solution to recursively read through all sheets, columns and rows in all excel files within a folder, including subfolders.
Look for any keywords you want.
requirement: openpyxl
simply pip.

用Astrogrep搞不定xlsx，干脆自己写了个
遍历目录下（包括子目录下）所有excel文件，读取所有sheet、行以及列，搜索指定关键词。
所需包： openpyxl
直接pip安装