[KongchangAI]
Unverified75% confidenceTradeoffTime unknown

腰靠尺寸与支撑效果存在权衡:大尺寸(高度≥30cm)支撑面积大更稳,但会占据座椅空间使腹部前顶、坐姿变浅;小尺寸便携但易滑动定位不准。孕妇选高度20-28cm、能覆盖腰椎L1-L5即可

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