阅读下面一首唐诗，回答下面题目。
                                                                                                                     春望
                                                                                                                                 杜甫
                                                                                                      国破山河在，城春草木深。
                                                                                                      感时花溅泪，恨别鸟惊心。
                                                                                                      烽火连三月，家书抵万金。
                                                                                                      白头搔更短，浑欲不胜簪。