[KongchangAI]
Unverified78% confidenceTradeoffTime unknown

球越大越安全(不易吞咽、砸伤面积分散更轻),但越大越难被小手抓握、投掷训练效果越差——3岁前重安全选大球,学龄前练精细动作可适当减小尺寸

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78%
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Long-term
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