functionbox(obj){obj.name="Lee";}varobj=newObject();obj.name="Look";box(obj);console.log(obj.name);//打印Leefunctionbox(obj){obj.name="Lee";}varobj=newObject();box(obj);obj.name="Look";console.log(obj.name);//打印Look上面2段代碼中，obj.name="Look"這句代碼放置的位置不同，為什么結果差別這么大？