string(292) "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%E6%A5%9A%E7%94%B5%E8%84%91%E8%BF%90%E8%A1%8C%E5%86%85%E5%AD%98%E5%8D%A0%E7%94%A8%E6%83%85%E5%86%B5 => Failed to connect to 14.18.117.71 port 38220: Connection refused"
怎么清楚电脑运行内存占用情况
