如下圖所示：
複製代碼代碼如下:
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var ga=document.createElement('script');ga.type?=?'text/javascript';?ga.async?=?true;
ga.src?=?('https:'?==?document.location.protocol???'https://ssl'?:?'http://www')?+?'.google-analytics. com/ga.js';
var?s?=?document.getElementsByTagName('script')[0];?
s.parentNode.insertBefore(ga,?s);
})();