string(285) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%AD%E5%9B%BD%E5%B0%8F%E5%9F%8E%E9%95%87%E7%9A%84%E7%89%B9%E7%82%B9%E5%92%8C%E7%A4%BE%E4%BC%9A%E5%8A%9F%E8%83%BD => Failed to connect to 101.89.143.195 port 38175: Connection refused"
中国小城镇的特点和社会功能
