string(239) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%80%8E%E4%B9%88%E6%89%8D%E8%83%BD%E6%B8%85%E9%99%A4%E7%94%B5%E8%84%91%E5%86%85%E5%AD%98 => Received HTTP code 403 from proxy after CONNECT"
怎么才能清除电脑内存
