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shi yu bu zhen kuai cha yuan yin
Pages: 54
Year: Issue:  1
Journal: Employment and Security

Abstract: 所谓的“食欲”是一种想要进食的生理需求。一旦这种需求低落、甚至消失,即称为食欲不振。简单地说,就是没有想吃东西的欲望。食欲不振的原因有多种:
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