[KongchangAI]
Unverified90% confidenceDecision RuleTime unknown

0-3月龄婴儿视觉聚焦距离约20-30cm且只能分辨黑白高对比色,此阶段应选黑白红色系床铃且挂件距眼睛保持25cm左右,彩色床铃在3月龄后视锥细胞发育成熟才有意义

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90%
Confidence
Long-term
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https://kongchang.com/claim/248853
API
curl https://kongchang.com/api/v1/knowledge/claims/248853
MCP
get_claim(id=248853)