一个对树控件上操作速度（添加，删除，排序）进行优化的例子，当对大量树节点进行操作时，此方法可以比常规方法明显快几倍甚至十几倍-A tree control on the operation speed (add, delete, sort) to optimize the example, when a large number of tree nodes in operation, this method can be significantly faster than conventiona