The answer for preventing you from falling into a state of subhealth is that you should （）

A．they have lost their living hopes
B．they have more pressure in life and work
C．they have used up their energy
D．they begin to get older

A．When you are in a state of subhealth, you shoud go to see a doctor and buy some medicine.
B．When you are in a state of subhealth, you should stay home and keep silent.
C．When you are in a state of subhealth, you should find out the reasons and relax yourself
D．When you are in a state of subhealth, you shoud have yourself examined in foreign countries.