回复: 标注对话
If your text has been tagged with <S> before the opening quotation mark and </S> after the closing quotation mark, you can simply replace all cases of <S> with <S><D> and all cases of </S> with </D></S>, just use FIND AND REPLACE (ALL) will do.
Of course you want to make sure that all instances of <S> correspond to the opening QM and all instances of </S> correspond to the closing QM.