string(243) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=cad%E6%89%93%E5%BC%80%E6%97%A0%E5%93%8D%E5%BA%94%E6%80%8E%E4%B9%88%E5%8A%9E => Failed to connect to 101.89.117.144 port 38056: Connection refused"
cad打开无响应怎么办
