string(265) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%BA%8C%E5%BB%BA%E6%A8%A1%E6%8B%9F%E5%A4%9A%E5%B0%91%E5%88%86%E6%89%8D%E6%9C%89%E6%8A%8A%E6%8F%A1 => Failed to connect to 14.116.215.7 port 38230: Connection refused"
二建模拟多少分才有把握
