阅读下面诗歌，回答相关问题。

                                                                      西 楼
                                                               （宋）曾巩
                                            海浪如云去却回，北风吹起数声雷。
                                           朱楼四面钩疏箔①，卧看千山急雨来。
                                         【注】①箔：是用苇或秫秸织成的帘子。