赏析《峨眉山月歌》，回答问题。
                                                                                               峨眉山月歌
                                                                                                   李白
                                                                                 峨眉山月半轮秋，影入平羌江水流。
                                                                                 夜发清溪向三峡，思君不见下渝洲。