Unverified90% confidenceDecision RuleTime unknown
1-2岁幼儿选纸板书（厚度≥1.5mm硬卡纸）+圆角设计，画面单页元素≤3个；3岁以上可选普通铜版纸绘本，接受多元素复杂画面
1
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90%
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Long-term
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