PPT 的好坏见仁见智，我仅从能否在工作场景下使用来主观评判；
Firefighters in Sicily have rescued about 400 rare books from a library in Niscemi that hangs on the edge of a mudflow, after a devastating landslide in January tore away an entire slope of the town and carved a 4km chasm.
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window.innerWidth / window.innerHeight 是长宽比，保证画面不变形。
Nature, Published online: 25 February 2026; doi:10.1038/s41586-026-10171-w