سؤال قراءة ستيب محلول — المفردات في السياق (تدريب 6952)

(1) Sickle cell anemia is a disease that damages red blood cells. The cells, which are normally round, become shaped like a sickle. A sickle is a crescent-shaped tool, used to harvest crops. The sickle-shaped cells are fragile and die quickly. Sickle cell anemia affects about 1 out of 12 people with African ancestry. It also affects people with South Asian, Middle Easter, or Mediterranean roots. (2) Like other types of anemia, sickle cell anemia causes tiredness, weakness, and shortness of breath. It also may lead to jaundice, which is a yellowing of the skin and eyes. The pain may occur in the arms, legs, stomach, or chest. A pain crisis can last from several hours to several days. People with sickle cell anemia also are more likely to get infections. In addition, children with the disease may grow more slowly than other children. (3) Sickle cell anemia is a genetic disease, which means that it is handed down from parent to child. For a child to have sickle cell anemia, both parents must carry the responsible gene. If only one parent has the gene, the child does not get the disease. However, the child may pass the gene on to his or her children. (4) There is no way to prevent sickle cell anemia. But I think a healthy lifestyle and medications can help patients to manage the symptoms. Infants and young children with the disease are treated with antibiotics, to prevent infections. Some patients may get transfusions of blood from healthy donors. A risky treatment called a bone marrow transplant is performed in serious cases. What does Paragraph (1) say about sickle cell anemia?