string(279) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=cad%E6%80%8E%E4%B9%88%E6%B8%85%E9%99%A4%E6%96%87%E4%BB%B6%E9%87%8C%E9%9D%A2%E7%9A%84%E5%9E%83%E5%9C%BE%E5%8C%85 => Failed to connect to 101.89.143.195 port 38109: Connection refused"
cad怎么清除文件里面的垃圾包
