Nearly 2 billion people in the world currently suffer from iron deficiency anemia Iron refers to

About 70% of the iron in the body is found in hemoglobin, and iron deficiency can affect hemoglobin synthesis in the body. Hemoglobin data is often used as a laboratory indicator to determine the presence of anemia.

Normally: Male hemoglobin is greater than 120 g litres and female haemoglobin is greater than 110 g litre.

In general, women are more susceptible to iron deficiency anemia because women lose blood regularly every month during their menstrual period. Therefore, on average, about 20 women and 50 pregnant women will have anemia, and some malnutrition, or long-term chronic bleeding caused by diseases, and various cachexia such as tumors and so on.

Iron in the human body is in a free form.

The ** of iron is divided into endogenous and exogenous. Endogenous iron is caused by the breakdown and rupture of aging red blood cells in the body, while exogenous iron is artificially supplemented by foods and drugs. Different foods contain different amounts of iron, which is abundant**:

animal blood, liver, chicken gizzard, beef kidney, soybean, black fungus, sesame;

If the anemia is not very severe, it can be improved gradually by simply adjusting the diet if it is diagnosed as not caused by a specific disease. The easiest thing to do is to pay attention to your diet and eat a balanced diet rich in iron. If the dietary iron intake is insufficient or the iron deficiency is severe, it is necessary to see a doctor and take oral or injectable iron as directed to correct it quickly.

In addition, vitamin C can effectively promote the body's absorption of iron

Answer]: B Iron deficiency anemia is most common in infants and young children aged 6 months to 2 years in Shengchang, and it is one of the "four diseases" (vitamin D deficiency rickets, pediatric nutritional iron deficiency anemia, pneumonia, and infant diarrhea) that children in China focus on prevention and treatment.

Answer]: E-prone population: pregnant women with daughters, menstrual women with split, infants and young children and Peiyuanfeng children are the high-incidence groups, among which infants under 2 years old and women of childbearing age have the highest prevalence.

Answer]: E test center] iron deficiency anemia **.

Analysis] Iron deficiency anemia includes: inadequate intake and increased requirement, chronic blood loss, and poor absorption. The five conditions given in the question are that chronic blood loss is the most common.

Answer A analysis: According to the definition and application of elements, elements refer to a class of atoms with the same number of nuclear charges, is a macroscopic concept, commonly used to describe the composition of substances, iron, iodine, etc. in food, medicine, etc. are all referred to elements

Answer: It is reported that "nearly 2 billion people in the world suffer from iron deficiency anemia", and the "iron" here refers to iron, so A is correct, and B, C, and D are false

Answer B There can be insoluble iron element, ferric tetroxide, ferric oxide and other substances in the blood of the human body, in fact, the human body is usually deficient in iron, iodine, calcium, etc., all refer to the elements

Normally, pregnant women, adolescents, children, and the elderly are most likely to suffer from anemia. Secondly, to the female population, people with poor gastrointestinal digestion, people who are partial to eating or receptive, such people are especially prone to anemia.

Iron deficiency anemia is a symptom rather than a disease, but many diseases start with anemia. Therefore, iron deficiency anemia should be corrected in time**, mild anemia is normally supplemented with food, if the moderate anemia or gastrointestinal digestion is not good, people who want to correct it quickly need oral iron supplementation to achieve the desired effect. It is best to choose iron tablets with good mildness and easy absorption, so that there is no *** for the body and good for absorption.

Generally speaking, people who are picky eaters and do not like to eat meat are prone to iron deficiency anemia, of course, chronic blood loss in the body will also cause iron deficiency anemia, women have a monthly menstrual period, and the possibility of anemia is greater than that of ordinary people.

People with iron deficiency anemia should be corrected in time, supplementing meat foods, and heme iron supplements, such as Lixuekang, are good.

Folic acid deficiency. Folic acid cannot be synthesized in the human body and must be taken from food, and foods rich in folic acid are mainly green vegetables and fruits. Animal liver and kidney.

People who often do not eat vegetables and fruits, and do not eat animal offal, are prone to insufficient folic acid intake. Folic acid is one of the raw materials for hematopoiesis, and a deficiency of folic acid can also cause anemia.

Iron is in short supply. The human body needs more iron than usual, such as growing children, lactating children and pregnant and lactating women are all people who need a lot of iron, and the demand for iron is large during special periods, but the iron supply is insufficient, which can easily lead to iron deficiency anemia.

Vitamin B12 insufficiency. The body's vitamin B12 is also mainly supplied by food, and animal foods are rich in vitamin B12, such as liver, meat, and kidneys. Eggs and milk are second, and the content in vegetables is very small, so not eating animal food, only eating vegetables, will also cause vitamin B12 deficiency, the survival time of red blood cells is moderately shortened, although the number of megaloblasts in the bone marrow at all stages increases, it will lead to NDA synthesis defects, and heme synthesis will also be impaired, which will lead to megaloblastic anemia.

Excessive iron loss. Free iron can be lost as gastrointestinal epithelial cells age and are shed. In gastric resection, atrophic gastritis, and steatorrhea, the rate of epithelial cell turnover increases, so the loss of free iron increases.

Iron deficiency not only causes a decrease in heme synthesis, which can lead to iron deficiency anemia.

It is reported that "nearly 2 billion people in the world suffer from iron deficiency anemia", and the "iron" here refers to the element iron, so A is correct, and B, C, and D are wrong

So choose A