[KongchangAI]
Unverified85% confidenceDecision RuleTime unknown

长途飞机/大巴选U型闭合式颈枕(前颈开口小),前颈支撑高度15-20cm可托住下巴防止头部前倾;短途或办公室午睡选可180度弯折的开放式或马蹄形

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