string(269) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=cad%E6%96%87%E4%BB%B6%E8%BF%87%E5%A4%A7%E6%B8%85%E7%90%86%E5%91%BD%E4%BB%A4%E6%80%8E%E4%B9%88%E5%8A%9E => Failed to connect to 101.91.112.32 port 38162: Connection refused"
cad文件过大清理命令怎么办
