Трамп высказался о непростом решении по Ирану09:14
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.
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但其实，用户没必要长时间悬空手臂使用 Mac，只是在一些特定的场景，使用手指直接点击、拖动，真的会比触控板更方便直观，也更符合现代人的习惯。
// or your fine-tuned version