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游戏设置的窗口尺寸是固定的吗？在不同平台上的窗口尺寸可以自动改变吗？
如何实现将对象拖拽到指定范围内则加分，在其他范围则不加分？
如何在拖拽对象时只有放在规定范围后不被移动，不放在规定范围的话返回到原位置？