阅读下面这首诗，完成题目。
                                                                                                    送魏十六还苏州
                                                                                                             皇甫冉^①
                                                                                  秋夜沉沉此送君，阴虫^②切切不堪闻。
                                                                                  归舟明日毗陵道，回首姑苏是白云。
         ［注］①皇甫冉，唐代诗人。作者的朋友魏十六曾从苏州（即“姑苏”）到常州（即“毗陵”）来拜访他；魏十六返回苏州时，作者乘船相送。②阴虫，指蟋蟀。