Unverified85% confidenceDecision RuleTime unknown
3岁以下幼儿建议选机身重量≤80g、笔杆直径≥2.5cm的粗杆设计，握持更符合小手抓握发育；6岁以上可选细杆90-110g笔
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85%
Confidence
Long-term
Relevance
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