Please recommend an ampoule that is good to use during the changing seasons.

Hello. According to the calendar, we have already entered summer, but the weather seems so erratic. It feels chilly at night, yet the next morning it is so hot that I have to turn on the air conditioner. Today, there is a forecast for heavy rain, so it will likely get cold again. It feels like we might suddenly face sweltering heat before we know it. With the weather going back and forth like this, my skin condition is really deteriorating. It is truly difficult to manage my skin during this transitional season. One moment it is dry, the next it becomes an oil explosion. I would appreciate it if you could share some tips on how you manage your skin in this kind of weather, and also recommend some all-in-one ampoules. I really want to manage my skin conveniently with just one product.