Family affluence refers to the comprehensive performance of a family's economic income, property, consumption level, etc. It is an important indicator to measure a family's social status and quality of life. Family affluence not only affects the material life of family members, but also affects their spiritual life, especially teenagers, a special group who are in a critical period of physical and...

The largest component of the body is water, accounting for about 50% 60% of body weight, followed by fat. Others are proteins and sugars contained in muscles, and inorganic substances contained in bones. Body fat percentage refers to the ratio of body fat to body weight. The body fat rate of boys is about 17-23%; the body fat rate of girls is about 20-27%; 14~20% of boys under 30 years old; 17~2...