第19届肖邦国际钢琴比赛结束后，陆逸轩压轴登台连续三晚的庆典音乐会。图丨 © Krzysztof Szlezak
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.
，更多细节参见夫子
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McKenzie is responsible for a team of 40 people based at Halley VI for Antarctica's summer season from November to the middle of February.