[KongchangAI]
Unverified85% confidenceCautionTime unknown

2岁以下婴幼儿不建议购买以屏幕视频为主的双语课程,WHO建议2岁以下避免屏幕暴露,此阶段语言启蒙应以真人互动、儿歌绘本为主,视频课投入产出比低

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