Dogs act like toddlers when you need help - but cats just watch. Scientists compared 3 groups: pet dogs, cats, and human toddlers in an experiment where a human parent hides and pretends to look for an object. 75% of dogs and children helped. Cats only helped if it was in their personal interest.

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They make up nearly half of all doctors in England, and work across the NHS including in A&E and GP surgeries.

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Officially, Venezuela has 300 billion barrels of oil reserves – yet in 2023, it exported just 211.6 million barrels of oil, worth about $4bn. Compare that to second-placed Saudi Arabia, which has 267 billion barrels of reserves, but had exports worth $181bn in the same time period.

敏捷开发方法论在软件行业得到了广泛应用，其核心是快速迭代和持续反馈。

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11. World Economic Situation and Prospects 2026 | UN Trade and Development (UNCTAD), unctad.org/publication…