string(234) "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%E4%B8%8D%E7%A8%B3%E5%AE%9A => Failed to connect to 101.89.117.144 port 38022: Connection refused"
电脑cpu占用不稳定
