替换字符串时，传入键覆盖包括问题，比如 cover 与 str_cover ...

[yigeliuliuniu]

When replacing strings, passing keys overrides the problem, for example cover and str_cover. The string to be searched is cover to replace aaabbbcccc , and there is also another string to be replaced, str_cover to be replaced with qqqwwweeee. Although the replacement can generate a docx file, opening it with Office fails, and the file content is problematic. Please consider this issue accordingly.