string(265) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%9F%BA%E5%B0%BC%E7%B3%BB%E6%95%B0%E5%A2%9E%E5%A4%A7%E7%9A%84%E4%B8%8D%E5%88%A9%E5%BD%B1%E5%93%8D => Failed to connect to 61.171.74.35 port 38041: Connection refused"
基尼系数增大的不利影响
