string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%B4%E6%97%B6%E6%B6%88%E9%98%B2%E7%AE%A1%E9%81%93%E7%9B%B4%E5%BE%84 => Failed to connect to 101.89.117.144 port 38005: Connection refused"
临时消防管道直径
