In the Jedi survival game, there are several items that need to be added with blood, such as first aid kit, bandage, painkiller, functional drink and medicine box. First, you need to see what you have. As shown in the figure, you can see this by pressing the tab key on the keyboard.
I only have one kind of bandage here (which is also used for other things). Right-click the bandage, as shown in the figure.
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After adding it, you can see that the blood volume here is increasing, as shown in the figure.