Unverified80% confidenceDecision RuleTime unknown
腰枕软硬度需与床垫软硬反向搭配：软床垫身体下陷多，腰枕应偏薄偏软（3-5cm）避免顶腰；硬床垫空隙大，腰枕应偏厚（6-10cm）填补支撑
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