string(260) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%80%8E%E6%A0%B7%E5%B0%86cad%E6%B8%85%E7%90%86%E5%B9%B2%E5%87%80%E5%91%A2%E8%A7%86%E9%A2%91 => Failed to connect to 101.91.112.32 port 38221: Connection refused"
怎样将cad清理干净呢视频
