北京蔚来ET7车主王先生的态度颇具代表性：“我知道神玑芯片很厉害，参数很漂亮。但作为车主，我感受到的提升并没有参数那么夸张。日常通勤中，日常通勤中，小鹏的XNGP和蔚来的NOP+在接管率上已经相差无几，我觉得这笔‘技术税’交得有点冤。”
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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