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It is focussed on West Antarctica, home to 30-40% of the global population of Emperor penguins. The animals are amongst the most threatened in the world.
，更多细节参见搜狗输入法2026
Regions with many nearby points keep subdividing. Regions with few or no points stay large. The tree adapts to the data: dense areas get fine-grained cells, sparse areas stay coarse. The split grid is predetermined (always at midpoints), but the tree only refines cells that need it. Sparse regions stay as single large nodes while dense regions subdivide deeply.
if (n <= 1) return;