The spatial view (the grid of rectangles) and the tree view (the hierarchy of nodes) represent the same structure. Searching for a point means walking down the tree: at each node, you check which of the four children contains your target coordinate and recurse into that child. You never visit the other three.
Point lookups are useful, but the operation you'll reach for more often is a range query: give the tree a rectangular region and retrieve every point inside it, without scanning the entire dataset.
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// 右侧第一个 <= cur 的元素, 所以用大于的就弹出
IBM 强调，AI 在代码领域确实能带来价值，但不应被误解为可以「一键替代」大型机平台。真正的现代化工作远比语言转换复杂得多。