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.
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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他又站了起来，似乎试图重新瞄准，但再次中枪倒地。
Purple: Space terms