n.维生素缺乏（病）；营养缺乏病

Avitaminosis D is a condition resulting from inadequate exposure to sunlight or intake of vitamin D.
The child was diagnosed with avitaminosis A, which led to severe vision problems.
Symptoms of avitaminosis B12 include fatigue, memory loss, and nerve damage.
She experienced avitaminosis E due to her strict vegan diet without sufficient plant-based sources of the nutrient.
Long-term malnutrition can lead to a state known as avitaminosis K, characterized by bleeding issues.
Proper supplementation is crucial to prevent avitaminosis C, a deficiency that weakens the immune system.
His physician prescribed a multivitamin to treat his avitaminosis, addressing deficiencies in several essential nutrients.
The elderly population is at risk for developing avitaminosis D, often due to limited sun exposure and poor dietary habits.
Recognizing avitaminosis Folic Acid is vital during pregnancy to prevent neural tube defects in the developing fetus.
In developing countries, avitaminosis Iron is a common health problem affecting children's growth and cognitive development.
缺乏维生素D会导致维生素D缺乏症。
这个孩子被诊断为维生素A缺乏症，导致视力严重受损。
维生素B12缺乏的症状包括疲劳、记忆力减退和神经损伤。
她由于严格的纯素饮食，没有足够的植物性维生素E来源，导致了维生素E缺乏症。
长期营养不良可能导致维生素K缺乏症，表现为出血问题。
适当的补充是防止维生素C缺乏症的关键，这会削弱免疫系统。
医生给他开了复合维生素来治疗他的维生素缺乏症，涵盖了多种必需营养素。
老年人由于阳光暴露不足和不良饮食习惯，易患维生素D缺乏症。
在妊娠期间识别叶酸缺乏（即维生素B9）至关重要，以防止胎儿神经管缺陷。
在发展中国家，铁缺乏症（avitaminosis Iron）是一个影响儿童生长和认知发展的常见健康问题。