大学英语四级考试（CET-4）的作文部分总分为15分。根据评分标准，作文主要从内容、组织结构、语法和词汇使用等方面进行综合评定。一篇优秀的作文通常需要具备清晰的主题表达、合理的段落安排、丰富的词汇以及准确的语法。

以下是一篇关于“健康生活方式”的英语四级作文示例：

A Healthy Lifestyle

In today’s fast-paced world, maintaining a healthy lifestyle has become more important than ever. A healthy lifestyle not only improves our physical well-being but also enhances our mental health and overall quality of life.

Firstly, regular exercise plays a crucial role in staying healthy. Whether it’s jogging in the morning, going to the gym, or simply taking a walk after dinner, physical activity helps keep our bodies strong and reduces the risk of various diseases. Secondly, a balanced diet is equally essential. Eating nutritious food, such as fruits, vegetables, lean proteins, and whole grains, provides our body with the necessary energy and nutrients to function properly. Avoiding excessive consumption of junk food and sugary drinks is also vital for long-term health.

Moreover, getting enough sleep is another key component of a healthy lifestyle. Adequate rest allows our body to recover from daily activities and boosts our immune system. It also improves concentration and productivity during the day. Lastly, managing stress effectively is crucial. Techniques like meditation, deep breathing exercises, and spending time with loved ones can help us stay calm and focused.

In conclusion, adopting a healthy lifestyle requires commitment and effort. By exercising regularly, eating healthily, sleeping adequately, and managing stress, we can lead happier and more fulfilling lives. Let’s make conscious choices every day to take care of ourselves and enjoy a healthier future.

这篇作文约150字，涵盖了健康生活方式的主要方面，并且符合英语四级作文的要求。希望对你有所帮助！