再次，国家需进一步满足居民住房方面的需求，探索以廉租房模式为核心的住房支持机制。对生育多孩的家庭，可通过低租金、长期稳定的保障性租赁住房予以支持。这一模式能够避免购房券等政策在实际落地中可能出现的覆盖不足、家庭支付能力有限等问题。
a change (‘damage’) occurs to the buffer, all chunks that overlap or come after the damage location are invalidated.
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B-Trees are ideal for Top K queries because they are sorted structures, so the retrieval of Top K results is trivially O(K). Easy and done, right? Our query drops to an impressive 5ms.