string(247) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%9B%91%E7%90%86%E5%91%98%E7%9A%84%E5%AE%9A%E4%B9%89%E5%92%8C%E8%81%8C%E8%B4%A3 => Failed to connect to 14.18.117.71 port 38041: Connection refused"
监理员的定义和职责
