[KongchangAI]
Unverified78% confidenceTradeoffTime unknown

单集时长控制在15-25分钟的碎片化课程更适合孕晚期(易疲劳、注意力难集中),而60分钟以上的长课适合孕早期系统学习;孕吐严重或睡眠差的孕妇应避免选择长视频课程

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