考慮以下代碼：questions = Question.objects.only('id', 'pqa_id', 'retain')del_questions = questions.filter(retain=False)# Some computations on del_questionsdel_questions.delete()add_questions = questions.filter(pqa_id=None)將add_questions不包含問題retain=False？即questions當(dāng)我們delete()在其子集上運(yùn)行時(shí)是否重新評估對象del_questions？