阅读下列短文,从每题所给的 A、B、C、D 四个选项中,选出最佳选项。
A balanced diet is crucial for our overall health and well - being. It provides the necessary nutrients that our body needs to function properly. A balanced diet consists of a variety of foods from all the major food groups: grains, vegetables, fruits, proteins, and dairy.
Grains are an important source of energy. They are rich in carbohydrates, which give us the fuel we need to go about our daily activities. Whole grains, such as brown rice, whole - wheat bread, and oats, are even better as they contain more fiber, vitamins, and minerals compared to refined grains.
Vegetables are packed with vitamins, minerals, and fiber. They are low in calories and can help us maintain a healthy weight. Different - colored vegetables offer different nutrients. For example, green leafy vegetables like spinach are high in iron and calcium, while orange - colored vegetables like carrots are rich in vitamin A.
Fruits are also a great source of vitamins, especially vitamin C. They are natural sources of sugar, but the sugar in fruits comes with fiber, which helps to slow down the absorption of sugar in the body. Eating a variety of fruits can also satisfy our sweet tooth in a healthy way.
Proteins are essential for building and repairing our body tissues. Good sources of protein include lean meats, fish, beans, lentils, and nuts. Protein is also important for the growth and development of children and teenagers.
Dairy products, such as milk, yogurt, and cheese, are rich in calcium, which is important for strong bones and teeth. However, some people may be lactose - intolerant and need to find alternative sources of calcium.
In conclusion, a balanced diet is the key to a healthy life. By eating a variety of foods from each food group, we can ensure that our body gets all the nutrients it needs.