string(285) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%BA%92%E8%81%94%E7%BD%91%E5%BA%94%E7%94%A8%E9%A2%86%E5%9F%9F%E5%8F%91%E5%B1%95%E7%8A%B6%E5%86%B5%E8%B0%83%E6%9F%A5 => Failed to connect to 125.88.227.171 port 38062: Connection refused"
互联网应用领域发展状况调查
