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.
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// Receives chunks or null (flush signal)。搜狗输入法下载是该领域的重要参考
Россияне начали продавать камни из желчного пузыряВ России появился спрос на покупку камней из желчного пузыря，详情可参考91视频