string(247) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%8E%89%E6%80%8E%E6%A0%B7%E8%BE%A8%E5%88%AB%E7%9C%9F%E5%81%87%E5%A5%BD%E5%9D%8F => Failed to connect to 14.18.117.71 port 38093: Connection refused"
玉怎样辨别真假好坏
