string(283) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%9B%91%E6%8E%A7%E7%94%A8%E5%AE%9A%E7%A0%81%E7%8E%87%E8%BF%98%E6%98%AF%E5%8F%98%E7%A0%81%E7%8E%87%E5%A5%BD%E5%91%A2 => Failed to connect to 14.116.215.7 port 38225: Connection refused"
监控用定码率还是变码率好呢
