string(264) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%A4%A7%E6%95%B0%E6%8D%AE%E5%8F%AF%E8%A7%86%E5%8C%96%E7%9A%84%E7%BB%8F%E5%85%B8%E6%A1%88%E4%BE%8B => Failed to connect to 14.18.46.51 port 38206: Connection refused"
大数据可视化的经典案例
