Step through the construction below. Each time a new point is inserted, watch the tree decide whether it needs to split a region:
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63-летняя Деми Мур вышла в свет с неожиданной стрижкой17:54
在开局阶段、关键时期，能否坚持按规律办事，做到蹄疾而步稳，尤其需要检视政绩观。