美国成年人吸烟率创纪录新低至9%

本文如何被排名

Signal score

0 / 100

Composite score across the factors below. Higher = stronger signal that this story matters right now.

Newsworthiness bucket

Research

文章讨论了一项重大的公共卫生成就（吸烟率创历史新低）以及相关的政策决定（预防项目资金削减）。[lever_c_demoted from significant: ic=1 ai=0.0]

Source corroboration

Single-source cluster

Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.

Topics

policy, other

Editorial topic classification. Feeds into how the story surfaces on /topic/<slug> hub pages and into the per-entity coverage mix.

AI-industry relevance

Low

Off-topic or adjacent — cluster remains reachable but doesn't surface in AI-industry rankings.

Story freshness

132 days old

Aged out of breaking-news scoring windows; ranking reflects the durable signal from the full source set.

完整方法见我们的编辑标准。