阅读下面的文本, 从A、B、C、D四个选项中选出最佳选项。

    Healthy eating doesn't just mean what you eat, but how you eat. Here's some advice on healthy eating.

Eat with others. It can help you to see others' healthy eating habits. If you usually eat with your friends or family, you will find that the food you eat is more delicious.

Listen to your body. Ask yourself if you are really hungry. When you are thirsty, drink a glass of water. Before, during and after exercise, you need to drink more water. It's not a good idea to eat much food when you are thirsty.

    Eat breakfast. Breakfast is the most important meal of the day. It's really bad for you to go to school without breakfast. A good breakfast includes some bread or rice, an egg, milk and fruit. You also need to get up early to enjoy your breakfast. Don't hurry.

    Eat healthy snacks. You may think eating snacks is unhealthy. In fact, it's a good idea to eat two healthy snacks like fruits, yogurt or cheese between your three meals. Of course, foods like cookies, ice-cream or instant noodles are not on the list of healthy snacks.

              . Try to eat dinner at least 3 hours before you go to bed. For example, if you go to bed at 10 o'clock, you'd better have dinner before 7. This will help your body to digest most of the food before you rest for the next 8 to 10 hours.

    Eating healthily will help you keep fit and live well一for today and tomorrow.

①甲和乙的溶解度相等时，温度为____ ℃；

② 40 ℃时，将相同质量的甲、乙的饱和溶液，分别降温至20℃，析出晶体较多的是 ____ ；                 

③ 40℃时，要完全溶解60 g乙得到饱和溶液，需要水 ____ g；

④ A、B两点是甲物质的两种不同状态的溶液，要实现A到B的转化方法是____。

在宽为40m，长为64m的矩形广场上，修建同样宽的三条道路，两条纵向，一条横向，并且互相垂直，把耕地分成面积相等的六块作为草坪，要使草坪面积为2418m²，若道路宽为xm，根据题意列出方程为 (       )