高亮后的文本，导出后错乱。只要文字一多就容易乱，并且字很难选中，总出现empty。
错乱例子：
原文：This is my good book bought in the market yesterday.
导出: This is my book the market good bought in yesterday.
导出后文本完全无法阅读。
你们试 ...
错乱例子：
原文：This is my good book bought in the market yesterday.
导出: This is my book the market good bought in yesterday.
导出后文本完全无法阅读。
你们试 ...