说明：  Voronoi图，又叫泰森多边形或Dirichlet图，它是由一组由连接两邻点直线的垂直平分线组成的连续多边形组成。
(Voronoi diagram, also known as Tyson polygon or Dirichlet diagram, is composed of a group of continuous polygons composed of vertical bisectors connecting two adjacent points.)