将树型显示在屏幕上。全部关键字插入完毕时显示树型，之后每完成一次插入或删除操作后也显示当前的树型。-The tree is displayed on the screen. All keyword insertion is complete display tree, also displays the current tree after each time you insert or delete operation.

rrts星型算法，一种新型的快速随机树法， 能够有效缩短路径长度-A new type of fast random tree method can effectively shorten the path length