string(276) "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%B2%A1%E5%8F%8D%E5%BA%94%E6%98%AF%E6%80%8E%E4%B9%88%E5%9B%9E%E4%BA%8B%E5%91%A2 => Failed to connect to 14.18.46.51 port 38044: Connection refused"
cad打不开没反应是怎么回事呢
