The World Health Organization（WHO）planned to study the relationship between the eating habits of the people and the disease．Two doctors were chosen to make the study．
They flew to Africa south of the Sahara and during the next two months visited ten countries．They found that serious diseases of poor eating, often mistaken for other diseases, existed in all parts of Africa．The diseases were similar and could therefore all be named kwashiorkor(恶性营养不良)．The diseased children are usually from one to four years old．As the illness progresses, the child’s stomach becomes swollen by liquid collecting in the body．The skin changes colour and may break out in open sores．The hair changes colour and starts to fall out．The patient loses all interest in his surroundings and even in food, and becomes so weak that he wants to lie down all the time．Stomach liquids are no longer produced．
The doctors reasoned that kwashiorkor was found in the young children of this age in many parts of Africa because of lack of milk or meat．Their mothers gave them foods full of starches（淀粉）instead of greatly needed proteins．They found that the addition of milk to the food of children suffering from kwashiorkor saved many lives．
67.From the passage we learn that kwashiorkor is a disease caused by _______．
A. poor living conditions B. lack of proteins in food
C. much stomach liquids D. lack of food
68.It is difficult to discover kwashiorkor because _______．
A. it has no viruses B. it does not last long
C. it is hard to see signs of it D. it is like other diseases
69.What is mentioned as a simple but reasonable way of curing this disease?
A. Taking a special medicine． B. Avoiding any food containing starch．
C. Having more meat or milk． D. Taking medicines full of proteins．
70.What’s the best title for the article?
A. Milk and Meat Are Daily Necessities B. Kwashiorkor and Bad Eating Habits
C. A New Form of Illness in Africa D.A Case of Eating Habits