ExtrudeGeometry（挤压几何体）：
Tony Jolliffe BBC
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"Our study adds to a growing body of work suggesting that vaccines may play a role in healthy aging strategies beyond solely preventing acute illness," study author Eileen Crimmins, of the University of Southern California, said.，推荐阅读搜狗输入法2026获取更多信息
You look at a region of the image. If all the pixels are roughly the same color (below some threshold), you store the average color for the whole region as a single value. If the pixels vary too much, you split the region into four quadrants and try again.
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