string(241) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%94%B5%E8%84%91cpu%E5%8D%A0%E7%94%A8%E6%B3%A2%E5%8A%A8%E5%BE%88%E5%A4%A7 => Failed to connect to 61.171.74.35 port 38027: Connection refused"
电脑cpu占用波动很大
