string(238) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%B9%B2%E5%BE%97%E4%BA%86%E5%86%9C%E6%B4%BB%E4%B8%8B%E4%B8%80%E5%8F%A5 => Failed to connect to 14.18.117.71 port 38133: Connection refused"
干得了农活下一句
