string(263) "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%BE%83%E5%A4%A7%2C%E6%80%8E%E4%B9%88%E5%A4%84%E7%90%86%E5%B0%8F%E7%82%B9 => Failed to connect to 101.91.112.32 port 38195: Connection refused"
cad文件较大,怎么处理小点
