string(241) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=cad%E6%89%93%E4%B8%8D%E5%BC%80%E6%80%8E%E4%B9%88%E5%BC%84%E5%87%BA%E6%9D%A5 => Failed to connect to 14.18.117.71 port 38093: Connection refused"
cad打不开怎么弄出来
