string(275) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%95%B0%E6%8D%AE%E5%8F%AF%E8%A7%86%E5%8C%96%E9%83%A8%E5%88%86%E7%9A%84%E5%91%88%E7%8E%B0%E6%80%9D%E8%B7%AF => Failed to connect to 101.91.112.32 port 38195: Connection refused"
数据可视化部分的呈现思路
