As an expert in the field of health and wellness, I can provide you with information on the recommended water intake according to the National Health Service (NHS) guidelines.

It's important to note that the exact amount of water a person should drink can vary depending on several factors, including their age, sex, weight, physical activity level, and overall health. However, the NHS suggests that, on average, adults should aim to drink 6-8 glasses of fluid a day. This includes total water intake from all beverages and foods, not just plain water.

Here's the breakdown in English:

"The National Health Service (NHS) recommends that adults should aim to drink 6-8 glasses of fluid a day. This includes all forms of liquid intake from beverages and foods, not just water."

And now, the translation in Chinese:

"英国国家医疗服务体系（NHS）建议成年人每天应该喝 6-8杯液体。这包括所有饮料和食物中的液体摄入，而不仅仅是水。"

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NHS Choices' page on Water and drinks says: Your body needs water or other fluids to work properly and to avoid dehydration. That's why it's important to drink enough fluids. In climates such as the UK's, we should drink about 1.2 litres (six to eight glasses) of fluid every day to stop us getting dehydrated.read more >>