选择文件夹后，程序自动搜索文件夹内所有WORD文件并检查是否包含输入字符串，并将结果列表，使用者可以将不需要替换的文件从列表删除-Select the folder, the program automatically search folder WORD file and check whether it contains the input string, and the results list, users will not need to replace files deleted from the list