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.
同时，部分品牌还将上调老款机型售价，2026 年中国手机市场或将首次出现一年内多次调价的情况，千元机市场也或将迎来「发了就是亏，卖了就是赔」的窘境。
，详情可参考搜狗输入法2026
US approves sale of Nvidia's advanced AI chips to China
arr[j + gap] = key;