阅读刘禹锡的《秋风引》一诗。

                                                                                                                         《秋风引^①》刘禹锡

                                                                                                                      何处秋风至？萧萧送雁群。
                                                                                                                      朝来入庭树，孤客最先闻。
       注：①引：古代的一种诗体。

读我国南、北方地区水资源和耕地资源比例示意图，完成以下小题．