Logitech G325 Lightspeed review
The A/D bits exist entirely for the operating system's benefit. The Accessed bit tells the OS which pages have been recently used, enabling page replacement algorithms to choose pages to evict when memory runs low. The Dirty bit tells the OS which pages have been modified and must be written back to disk before eviction; clean pages can simply be discarded and re-read from disk later.
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The algorithm maintains a running "best distance" that starts at infinity. As it walks the tree, it checks each visited point and updates the best distance if it finds something closer. Before recursing into a child node, it checks whether the closest possible point in that child's bounding box is farther than the current best. If so, the entire subtree gets pruned.
以红狗推出的“宠物年夜饭”为例，虾油、营养膏等产品在“人宠同源”的理念下被赋予了春节语境，年夜饭不只是给宠物吃的，更是一种情绪象征：即便主人不在身边，宠物也一起“过了年”。同时，还联合10地10家指定门店、发起拍照打卡、领取宠物新春年夜饭的活动，盘活线下门店、增强品牌效应。