阅读诗歌，完成后面小题。
                                                                                            谢亭送别
                                                                                                许浑
                                                                     劳歌一曲解行舟，红叶青山水急流。
                                                                     日暮酒醒人已远，满天风雨下西楼。
                                                                    【注】①劳歌：送别歌。