The first two requirements (“Efficient” and “Fine-grained”) are important for performance. Imagine a large spreadsheet with millions of cells containing formulas — it would be a huge waste of resources to recalculate every single cell, every time any input changes. Similarly, you don’t want to calculate the value of a cell multiple times if you can help it. In general, we want to do the minimum amount of work possible.
return err(f"all {max_retries} attempts to fetch {url} failed");
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2026-03-01 00:00:00:0朱珉迕3014281510http://paper.people.com.cn/rmrb/pc/content/202603/01/content_30142815.htmlhttp://paper.people.com.cn/rmrb/pad/content/202603/01/content_30142815.html11921 “万亿”辩证看，为民重千钧（今日谈）。新收录的资料对此有专业解读
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