据悉，苹果不仅于 2025 年 3 月推迟了 Siri AI 功能的部分升级，其 CEO 库克也在两个月后公开承认，开发更具个性化的 Siri「所花的时间比我们预期的要长」。
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free_table[j] = h-next_free;，详情可参考夫子
The pruned nodes (in red) represent entire regions of space that the algorithm never examines. The points inside those regions are never checked. Compare the "Nodes Visited" count to the total number of points. The quadtree is doing far less work than a brute-force scan.，更多细节参见91视频