string(276) "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 => Failed to connect to 101.89.117.144 port 38022: Connection refused"
监控用定码率还是变码率好
