string(301) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%94%B5%E8%84%91%E6%80%8E%E4%B9%88%E5%BD%BB%E5%BA%95%E6%B8%85%E9%99%A4%E5%86%85%E5%AD%98%E6%95%B0%E6%8D%AE%E5%92%8C%E6%96%87%E4%BB%B6 => Failed to connect to 14.18.117.71 port 38041: Connection refused"
电脑怎么彻底清除内存数据和文件
