古诗欣赏，回答下列问题：
                                                                                                               如梦令
                                                                                                                    李清照
                                                                                             昨夜雨疏风骤，浓睡不消残酒。
                                                                                             试问卷帘人，却道“海棠依旧”。
                                                                                           “知否？知否？应是绿肥红瘦。”