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.
And check the next blog post about a simplified deprecation API built on top of BPatterns:
，更多细节参见爱思助手下载最新版本
The European Service Module provides power and propulsion and life support systems
在输入框右下角的下拉选择中，选择「Tbox」
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