string(276) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%96%E7%95%8C%E6%9C%80%E9%95%BF%E7%9A%84%E5%8D%81%E5%A4%A7%E6%B2%B3%E6%8E%92%E5%90%8D%E7%AC%AC%E4%B8%80 => Failed to connect to 101.89.159.206 port 38100: Connection refused"
世界最长的十大河排名第一
