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维生素D缺乏, 以上为机器翻译结果，快速获取精准的人工翻译结果，建议选择有道人工翻译 - 1
“The cause of dementia is not vitamin D deficiency, ” said David Llewellyn, a research associate at Cambridge University and the study’s lead author. 这项研究报告的主要作者，剑桥大学的研究助理大卫卢埃林说：“老年痴呆症的原因并不是维生素D缺乏。 - 2
Vitamin D has become a very hot topic in medicine now as we are discovering very high levels of Vitamin D deficiency in our population, not only in the United States, but worldwide. 他说：“现在，我们发现不仅美国人缺乏维生素D的比例很高，全世界都是如此，因此维生素D成为医学界的热门话题。” - 3
Vitamin D inadequacy was defined as <32 ng/mL, vitamin D insufficiency was defined as 20 to <32 ng/mL, and vitamin D deficiency was defined at <20 ng/mL. 维生素D含量在32ng/mL左右为维生素D缺陷（inadequacy）， 20—32ng/mL为维生素D不足（insufficiency），低于20ng/mL为维生素D缺乏（deficiency）。
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