string(309) "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%B8%85%E7%90%86%E7%94%B5%E8%84%91%E5%86%85%E5%AD%98%E6%9D%A1%E9%87%8C%E7%9A%84%E6%95%B0%E6%8D%AE%E5%92%8C%E6%96%87%E4%BB%B6 => Failed to connect to 14.18.46.51 port 38044: Connection refused"
怎么清理电脑内存条里的数据和文件
