failure and eventually death.

　　What are the common symptoms of the disease?

　　Fever. Headache. Joint and muscle aches. Weakness. Diarrhea. Vomiting. Stomach pain. Lack of appetite. Chills. Rash. Redness in the eyes. Hiccups. Cough. Sore throat. Chest pain. Difficult breathing or swallowing. Bleeding inside and outside of the body.

　　How to prevent the spread of Ebola?

　　Ebola can be spread primarily via direct contact with patients, specifically the blood and fluids of an infected patient.

　　We should avoid contact with infected patients and objects such as clothing, bedding, and needles used by them. Avoid areas where infections have been reported. For now, the disease has only been confirmed in central and West Africa, four cases in America and Europe. Avoid eating wild-caught bush meat. Researchers have suspected that the disease came to humans via animals, probably through the meat of primates(灵长类). If you're in an area where the disease has been reported, avoid purchasing, eating, or handling wild game to stay on the safe side.

　　Wear protective medical clothing if you're around infected patients. Extreme caution is necessary. Hospital workers must use masks, gloves, goggles, and gowns, which needed to be worn at all times if you're around infected patients.

　　How Do People Survive Ebola?

　　Doctors don't know for certain who will survive Ebola, and there is no specific treatment or cure for the disease. Although in the minority, some people do recover from infection.

　　Our suggestions include:

　　Maintain your electrolytes(电解质) and body liquid. Sports drinks can be used. Monitor your blood pressure and control it if necessary. Dropping blood pressure may be a serious sign of infection. Breathe in an oxygen-rich environment. Quickly address any symptoms of infection. Be honest about when and where you're feeling pain.

4. Ebola causes the death of a human being by .

A. attacking him with high fever B. regulating his immune system