When another data point is inserted and the Voronoi diagram reconstructed, the newly created region displaces the area that once belonged to the old regions. Those points whose regions were displaced are considered natural neighbours to the new point. The weight of each natural neighbour is given by the area taken from the total area occupied by the new region. In 3D, we measure polyhedral volumes instead of areas.
（新华社北京2月27日电 记者韩洁、胡璐、古一平、韩佳诺）
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Donald Campbell, advocacy director at Foxglove, a group of campaigning lawyers, said Miliband's letter to the committee "raises more questions than it answers".