说明：  具备k邻域收索算法，根据不同的k值实现邻域收索，并输出收索后的邻域数据，通过交互式的界面实现邻域点的查询！
(K neighborhood have received cord, cable algorithm to achieve a different neighborhood close k values ​ ​ through the GUI interface, and can output data after neighborhood close cord, also has good interactive input manually check!)