A quadtree reduces this: rebuild the tree each frame, and for each object, query only the nearby region. Objects in distant quadrants are never compared.
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Number (4): Everything in this space must add up to 4. The answer is 5-3, placed vertically; 1-1, placed horizontally.
第二天，销售回复开始涌入。Stuyvenberg 让 AI 继续操作：每隔几分钟检查邮件，把最低报价转发给其他经销商，要求他们“看看能不能给出更低的价格”。当销售试图打电话或发短信推进沟通时，AI 礼貌地把对话引回邮件，让整个流程更可控。