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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It can take a long time for the body to return to normal, so the pair will be given an extensive exercise regime as their bodies re-adapt to living with gravity.，推荐阅读快连下载安装获取更多信息