克林頓副幕僚長安赫爾・烏雷尼亞（Angel Ureña）向BBC表示：「克林頓總統對愛潑斯坦的罪行一無所知，也沒有任何東西需要隱瞞。」他說克林頓沒有寄出愛潑斯坦文件中的任何電子郵件。
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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.