帮你搜索到一篇赏析http://cache.baidu.com/c?word=%BC%D9%C8%E7%3B%C4%E3%3B%D7%DF%C0%B4%2C%C9%CD%CE%F6&url=http%3A//www%2Eblogcn%2Ecom/user34/farewellyhc/blog/22016226%2Ehtml&b=0&a=156&user=baidu