string(244) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=rank%E5%87%BD%E6%95%B0%E6%80%8E%E4%B9%88%E8%BF%9B%E8%A1%8C%E6%8E%92%E5%90%8D => Failed to connect to 101.89.143.195 port 38205: Connection refused"
rank函数怎么进行排名
