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For well-distributed points, nearest neighbor search is often near O(logn)O(\log n)O(logn) in practice. In the worst case (all points clustered tightly or along a line), it can degrade to O(n)O(n)O(n), but this is uncommon with typical spatial data.
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Q.ai 的核心技术是肌电图（EMG）与微表情分析，这听起来像赛博朋克小说里的设定，但原理其实非常生物学：当我们想要说话时，大脑会向发声器官发送神经电信号。即使我们最终压低声音、甚至根本没有发出声音，喉咙、下颌和脸颊的肌肉依然会产生微弱的生物电波动。