Unverified80% confidenceDecision RuleTime unknown
睡姿矫正背心的背部凸起球体/硬块直径应在4-6cm，过小无法有效阻止仰卧翻身，过大压迫脊柱反而影响睡眠。软质海绵填充比硬塑料球夜间舒适度更高
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