I recall two pictures drawn by the children of Ningxia.
2
为了解宁夏农村3岁以下儿童的营养状况，对宁夏6县进行了随机抽样横断面调查。
Objective Under design of cross sectional study and randomly sampling, a survey was conducted in 6 counties of Ningxia province in China on the status of nutrition of children under 3 years old.
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