阅读下面这首诗，完成习题。
                                                                                                           秋夜
                                                                                                                朱淑真
                                                                                    夜久无眠秋气清，烛花频剪欲三更。
                                                                                    铺床凉满梧桐月，月在梧桐缺处明。
注释：烛花即灯花。古人认为灯花是一种喜事的预兆，有杜甫诗句为证：“灯花何太喜，酒绿正相亲”（《独酌成诗》）。