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.
But when her mission finally took to the skies in 2005, the nightmare scenario happened again. A chunk of foam broke away during launch.，详情可参考旺商聊官方下载
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"He carries the load of home and family life. It still probably raises an eyebrow when he's called into a meeting and he says it has to be between 10am and 3pm. They'll be shocked that a man has said that," says Begg.