预防感冒的方法

var _hmt = _hmt || []; (function() { var hm = document.createElement("script"); hm.src = "https://hm.baidu.com/hm.js?1e34879716a4483f0c4cc7c6f865cb5c"; var s = document.getElementsByTagName("script")[0]; s.parentNode.insertBefore(hm, s); })();