读下列古诗，按要求答题。

                                                                                                  润州听暮角①
                                                                                                 （唐）李 涉
                                                                                 江城②吹角水茫茫，曲引边声怨思长。
                                                                                 惊起暮天沙上雁，海门斜去两三行
      【注】：①文宗时，诗人曾被流放康州，此诗很可能是作于迁谪途中。②江城：临江之城，即润州。