单项选择题
A．salted meat and biscuits B．exhaustion C．want of some essential substances D．lack of fresh vegetables and fruits
A．not to eat much salted meat B．to supplement our diet with various vitamin pills C．to have more fresh fruit and vegetables D．to develop a good dietary habit
A．vitamin pills are of no avail B．nutritious food might be unhealthy C．vegetable leaves can be a good remedy D．religions fasting may help out a lot