document.write ("<b>上一篇</b>：<a href='/UserData/DocHtml/2020/4/5/350567401995.html'>新冠肺炎症状表现</a><br><b>下一篇</b>：<a href='/UserData/DocHtml/2019/2/28/309574661775.html'>春季传染病的预防知识</a>")