Handlers module
自然保护区设立后，原则上不得撤销；因特殊情形失去保护价值的，经原批准设立该自然保护区的人民政府批准，可以撤销。
，这一点在哔哩哔哩中也有详细论述
Subsequent reports from NASA and the Office of the Director of National Intelligence (DNI) did not find any link between the unexplained phenomena and aliens, but that didn't stop enthusiasts from wanting to know more.
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.