与苏联当局交恶后，塔可夫斯基愈发频繁地显露出自己脆弱、多愁善感的一面。对儿子的思念成为他日记中最持久的主题。1985年，流亡中的塔可夫斯基在瑞典哥特兰岛完成了《牺牲》的拍摄，这部作品他在影像上达到了前所未有的宗教和哲学寓言的强度：面对世界末日的到来，为了换回人类的一线生机，片中的主人公决意献出一切。在影片制作期间，塔可夫斯基被确诊身患肺癌。拍摄结束后，他前往巴黎入院治疗，病痛的折磨和对生命的思考，充斥于那段时间的日记。
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The quadtree is the two-dimensional case of a broader family of space-partitioning data structures. Octrees extend the same idea to three dimensions (splitting cubes into eight children), KD-trees use alternating axis-aligned splits (splitting along x, then y, then x again), and R-trees group nearby objects into bounding rectangles. Each variant makes different tradeoffs between construction time, query speed, and update cost.。搜狗输入法2026对此有专业解读
BYOB ends up being complex for both users and implementers, yet sees little adoption in practice. Most developers stick with default reads and accept the allocation overhead.