阅读古诗，回答相关问题。

                                                                                                                                            西  楼
                                                                                                                                            曾巩
                                                                                                                  海浪如云去却回，北风吹起数声雷。
                                                                                                                  朱楼四面钩疏箔，卧看千山急雨来。
       【注】钩疏箔：把帘子挂起。