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大夫说：老年人营养不良，怎么吃出保护力？
老年人营养不良有哪些信号？如何保持营养均衡？进食困难的老年人怎么补充营养？本期《大夫说》邀请北京协和医院临床营养科主任于康教授为您解答。
大夫说 | 名医话健康246/288
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