// 步骤3：从后往前遍历数组（反向遍历更易理解，每个元素只入栈/出栈一次）
Donald Trump has spent much of his second term at war with science and scientists. He is cutting staff at institutions such as the Environmental Protection Agency (EPA) by a third, and has cancelled or frozen up to 8,000 federal research grants. This hasn’t just hurt individual research programmes, it has damaged America’s credibility as a reliable partner in the scientific community. It is not surprising that many researchers – one poll last year by the journal Nature gave the number of 75% – say they are considering leaving the US entirely.
描述：设计 StockSpanner 类。每次调用 next(price) 时，返回当日价格的「跨度」：从今天往回数，价格 ≤ 今日价格的最大连续天数（含今天）。，推荐阅读搜狗输入法2026获取更多信息
Гангстер одним ударом расправился с туристом в Таиланде и попал на видео18:08
，更多细节参见搜狗输入法2026
"These new figures show the total cost to taxpayers will be far higher than previously feared.，推荐阅读快连下载安装获取更多信息
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