如今特區政府提交立法會的還只是討論文件，而非立法草案。新政能否準時在年中起跑仍待觀察，但香港環境及生態局局長謝展寰承諾，局方將在首次發牌半年後檢視情況，決定會否放寬還是收緊法律。
A quadtree does the same thing for two-dimensional space. It takes a rectangular region and divides it into four equal quadrants: northwest, northeast, southwest, southeast. If a quadrant has too many points in it, it subdivides again and again. Each subdivision creates smaller and smaller cells where points are densely packed.
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Role, BBC中文特約記者,
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