string(285) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E9%87%87%E7%94%A8%E9%A1%B5%E8%84%9A%E6%96%B9%E5%BC%8F%E8%AE%BE%E5%AE%9A%E9%A1%B5%E7%A0%81%E7%9A%84%E6%96%B9%E6%B3%95 => Failed to connect to 101.89.159.206 port 38100: Connection refused"
采用页脚方式设定页码的方法
