The tree starts as a single region covering the whole space. As points arrive, they get dropped into the region that contains them. When a region exceeds its capacity (the maximum number of points it can hold before splitting), the region divides into four children, and the existing points get redistributed.
Цены на нефть взлетели до максимума за полгода17:55
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丰田1月销量同比增长4.8%，创历年1月销量新高