【分析】
首先，我们要围绕“Our healthy diet”这个主题搭建写作框架：第一步开篇点明健康饮食的重要性，引出核心话题；第二步分述健康饮食的食物构成，明确不同食物的食用原则，比如蔬果可多吃、肉鱼需适量；第三步补充饮食中的注意事项，包括充足饮水和限制甜食摄入；第四步强调规律用餐的好习惯；最后总结健康饮食的作用并发出呼吁，这样能让文章内容充实、逻辑顺畅，满足不少于10句话的要求。
【解析】
1. 标题与开篇：以"Our healthy diet"为标题，第一句"A healthy diet is very important for us."直接点明健康饮食的重要性，快速切入主题。
2. 饮食种类阐述："We need to eat different kinds of food."说明健康饮食需多样化；接着分别说明蔬果的益处与食用量："We should eat a lot of vegetables and fruits every day. They are good for our health."；介绍主食类食物："We can also have some rice, noodles or bread."；说明肉鱼的价值及食用原则："Meat and fish are good for us too, but we shouldn't eat too much."。
3. 饮食注意事项："We need to drink enough water every day."指出饮水的必要性；"We should not eat too much sweet food, like candy and chocolate. They are bad for our teeth."说明过量甜食的危害。
4. 用餐习惯强调："We should have three meals a day on time."提醒保持规律三餐的好习惯。
5. 总结与呼吁："A healthy diet helps us stay strong and happy. Let's have a healthy diet together."总结健康饮食的积极作用，发出共同践行的呼吁，使文章结构完整。
【答案】
Our healthy diet
A healthy diet is very important for us. We need to eat different kinds of food. We should eat a lot of vegetables and fruits every day. They are good for our health. We can also have some rice, noodles or bread. Meat and fish are good for us too, but we shouldn't eat too much. We need to drink enough water every day. We should not eat too much sweet food, like candy and chocolate. They are bad for our teeth. We should have three meals a day on time. A healthy diet helps us stay strong and happy. Let's have a healthy diet together.
【知识点】
健康饮食话题写作、英语常用句型运用、日常饮食词汇
【点评】
这篇短文结构清晰、逻辑连贯，从健康饮食的重要性、具体饮食搭配、注意事项到用餐习惯，全面覆盖了健康饮食的核心内容，语言简洁易懂，贴合单元知识要求，且满足不少于10句话的写作要求，是一篇规范的主题短文。
【难度系数】
0.7