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A quadtree does the same thing for two-dimensional space. It takes a rectangular region and divides it into four equal quadrants: northwest, northeast, southwest, southeast. If a quadrant has too many points in it, it subdivides again and again. Each subdivision creates smaller and smaller cells where points are densely packed.
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OPPO Find N6 是 OPPO 即将推出的大折叠手机，结合博主「数码闲聊站」的爆料和入网信息，Find N6 的硬件轮廓已经基本清晰：处理器换上了骁龙 8 Elite Gen 5，并且细分出了普通版和卫星通信版两个型号，充电则稳扎稳打地停留在 80W。
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