Author Correction: Global subsidence of river deltas
Real image compression (JPEG, PNG) uses different techniques (DCT, entropy coding), but quadtrees capture the same principle: spend your bits where the detail is, not uniformly across the whole image.
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Experts say adding the varicella vaccine to the official NHS childhood immunisation programme will dramatically reduce the number of people who catch chickenpox, leading to far fewer serious cases.
第一百零八条 公安机关进行询问、辨认、勘验，实施行政强制措施等调查取证工作时，人民警察不得少于二人。