昨夜西风凋碧树，独上西楼，望断天涯路。出自何处。。。什么意境？出自晏殊的《蝶恋花》槛菊愁烟兰泣露。罗幕轻寒，燕子双飞去，明月不谙离恨苦，寒光到晓......