"Instead of dismantling everything, we can actually reuse the facilities, the skills, the competencies we have."
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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其他角度的视频显示，附近的警员正在与他们交火，警方武器的射击声可以清楚辨认。