Unverified80% confidenceDecision RuleTime unknown
通勤包背带宽度≥3.5cm且带肩垫可显著减轻肩颈压力，装电脑+文件后总重常达2kg以上，细窄硬背带长期使用易勒肩
1
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80%
Confidence
Long-term
Relevance
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