string(268) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%89%93%E5%BC%80cad%E5%B0%B1%E6%98%AF%E6%97%A0%E5%93%8D%E5%BA%94%E6%80%8E%E4%B9%88%E5%9B%9E%E4%BA%8B => Failed to connect to 14.18.117.71 port 38069: Connection refused"
打开cad就是无响应怎么回事
