Unverified80% confidenceTradeoffTime unknown
软硬权衡：偏软枕包裹舒适但支撑弱、颈部长期缺乏承托；偏硬枕支撑好但压迫感强影响入睡。理想状态是躺下后枕头能填满颈部空隙且头部下沉不超过2-3cm
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80%
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Long-term
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