When using tools, you should first reduce your physical strength, then reduce your fatigue, and then go to the hospital. Eating food or plants is to replenish physical strength. If your physical strength is 100 and becomes 95 after using tools, your physical strength will return to 100 after eating (if that thing can supplement 5 points of physical strength). And if your physical strength is 100 at first, you can increase your physical strength limit after eating the fruit of your strength. You can only eat 10 fruit in total, and your maximum physical strength is 255.