string(301) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%8F%B0%E9%A3%8E%E9%A2%84%E8%AD%A6%E4%BF%A1%E5%8F%B7%E7%9A%84%E9%A2%9C%E8%89%B2%E7%AD%89%E7%BA%A7%E4%BB%8E%E4%BD%8E%E5%88%B0%E9%AB%98 => Failed to connect to 14.18.117.71 port 38220: Connection refused"
台风预警信号的颜色等级从低到高
