string(357) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%88%91%E5%9B%BD%E5%B0%8F%E5%9F%8E%E9%95%87%E7%9A%84%E6%95%B0%E9%87%8F%E5%88%86%E5%B8%83%E5%8F%8A%E5%8F%91%E5%B1%95%E5%B1%82%E6%AC%A1%E9%83%BD%E5%91%88%E4%BB%80%E4%B9%88%E7%8A%B6%E6%80%81 => Failed to connect to 101.89.159.206 port 38100: Connection refused"
我国小城镇的数量分布及发展层次都呈什么状态
