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%E4%B8%8D%E5%BC%80%E4%BA%86%E6%80%8E%E4%B9%88%E5%9B%9E%E4%BA%8B => Failed to connect to 125.88.227.171 port 38062: Connection refused"
cad打不开了怎么回事
