string(238) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%99%BE%E9%A2%98%E6%96%A9%E9%80%9A%E8%BF%87%E7%8E%87%E9%AB%98%E5%90%97 => Failed to connect to 14.18.117.71 port 38133: Connection refused"
百题斩通过率高吗
