document.getElementById('nextId').innerHTML='<p>下一篇：<a href=/news/question/20231031031744.html>20个水处理基础知识汇总 入门了解(一）</a></p><p>上一篇：<a href=/news/question/20231213085434.html>饮水机里面的PP棉滤芯多长时间更换一次</a></p>'