阅读下面诗歌，完成题目。
                                                                                                                                    题金陵渡
                                                                                                                                     张　祜
                                                                                                              金陵津渡小山楼，一宿行人自可愁。
                                                                                                              潮落夜江斜月里，两三星火是瓜洲。
      【注解】①金陵渡：渡口名，在今江苏省镇江市附近。 ②津：渡口。③瓜州：地名，在长江北岸。