【单选题】Headaches Explained A headache is a symptom, not a disease. A headache is rarely the symptom of a serious illness, but severe or frequent headaches can be exhausting and can affect daily life. There a...
【简答题】What to Do If You Suspect a Food Allergy Consequences of food allergy 30,000 emergency room visits 2,000 hospitalization _____________________ Strategy 1: ____________________ Reasons: you may be miss...