Unverified85% confidenceDecision RuleTime unknown
24-36个月幼儿优先选大颗按扣+粗齿魔术贴+粗拉链组合，小纽扣（直径<2cm）和细拉链应放到3.5岁以后，过早引入精细扣件会因反复失败降低练习意愿
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85%
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Long-term
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