从给定的英文文本中提取关键词。
英文文本示例：“The importance of exercise and a healthy diet cannot be overstated. Regular physical activity and a balanced diet can help to maintain a healthy weight, reduce the risk of chronic diseases such as heart disease and diabetes, and promote overall well-being.”
关键词：exercise、healthy diet、physical activity、balanced diet、maintain、healthy weight、reduce、risk、chronic diseases、heart disease、diabetes、promote、overall well-being