阅读《闻王昌龄左迁龙标遥有此寄》，回答后面的问题。
                                                                                  闻王昌龄左迁龙标遥有此寄  

                                                                                              李白
                                                                            杨花落尽子规啼，闻道龙标过五溪。

                                                                            我寄愁心与明月，随君直到夜郎西。