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.
A perfectly practicable 1930s technology, but you can already see the downsides.
。一键获取谷歌浏览器下载是该领域的重要参考
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GM Matthew Wadsworth won in Ryde on tiebreak, Scottish GM Matthew Turner also shared first, while in Graz Scotland’s Freddy Waldhausen Gordon, 15, qualified for the IM title