XMLHttpRequest cannot load http://api.bing.com/qsonhs.aspx?q=a. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'file://' is therefore not allowed access.在這個課程中怎么解決啊。搜索中，都是提到在服務器代碼中添加什么的！但是這里都沒有服務器端代碼。所以請問一下在這里怎么用原生JS解決？？？？？