My project may feel very strange at first sight, which is of course normal. My design direction is people’s demand for water. I drink water constantly while doing some research, so I thought of drinking water as a research direction and record how much of my body is responsible for drinking water in a day. demand. I can't determine some data, such as the initial water volume data, and the total amount of water, so I set up a constant volume to measure these data. The variable I recorded was the amount of water I would drink when doing things at different stages of the day. It decreased to indicate a gradual need to drink water, and a rapid increase in a time to indicate supplemental water.