string(258) "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%E7%9A%84%E6%8F%90%E9%AB%98%E8%AF%B4%E6%98%8E%E4%BA%86 => Failed to connect to 101.89.117.144 port 38056: Connection refused"
基尼系数的提高说明了
