drop-newest: Discards incoming data when full. Useful when you want to process what you have without being overwhelmed.
也要看到，新鲜感来得快去得也快，靠噱头制造的热度终究难以持久。近年来，不乏有高价水果因口感与普通品种差异不大，被消费者迅速“用脚投票”、端离餐桌；一些果农盲目跟风扩种，品质管控跟不上，陷入增产不增收的困境。这启示从业者：人们最终愿意为之买单的，唯有过硬的品质与实在的性价比。高端不该只是包装加持，特色更不能只是噱头营销。优胜劣汰的市场法则面前，谁也没有例外，唯有沉下心来打磨产品品质，才能获得长远发展。
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Border Points: Each cluster has a limited number of defined "border points" – these are the gateways in and out of the cluster.
Qatar and Turkey mediated between the two sides, with talks held in Doha and Istanbul. A fragile ceasefire followed, but the negotiations failed to bring about a ceasing of hostilities between the two sides.