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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Predicate-based matching: wait_for, wait_for_not, and wait_for_not_none all route through a shared _wait_for_condition(predicate) core.

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二、首次跌停板的风险提示1. 六国化工（600470）：磷化工标的，业绩巨亏+估值翻倍高估，资金出逃跌停

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