string(267) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%B3%BB%E7%BB%9F%E5%88%86%E6%9E%90%E4%B8%8E%E9%9B%86%E6%88%90%E4%B8%93%E4%B8%9A%E4%BB%A3%E7%A0%81 => Failed to connect to 101.89.143.195 port 38205: Connection refused"
系统分析与集成专业代码
