Unverified82% confidenceDecision RuleTime unknown

侧睡颈枕的两侧侧翼高度应≥8cm，才能在头部倾斜靠向车窗/椅背时提供足够的横向支撑，防止头部继续下滑压迫颈动脉

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Unverified仰卧为主者应选颈部支撑高度8-10cm、后脑凹陷区高度低于颈部区3-4cm的曲线枕，使颈椎维持自然前凸（约30-40度）；单纯追求高枕会加剧颈椎变直87% similar Unverified身高175cm以上或需要午睡仰躺，头枕必须支持高度+角度双向调节，固定头枕往往顶不到后脑或位置过低顶脖子87% similar Unverified头部保护枕与安全座椅头靠之间应无较大缝隙，若枕体过厚顶开头靠，反而使头部前倾——选可调节高度或厚度≤4cm的贴合款86% similar

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