16.

  1. Nausea.
  2. Fever.
  3. A cold.
  4. Diarrhea.

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17.

  1. The stale food he ate.
  2. The fruit juice he drank.
  3. Too much food he ate.
  4. The cold he got.

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18.

  1. Porridge.
  2. Purified water.
  3. Pizza.
  4. Apple juice.

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19.

  1. When his stool becomes loose and watery.
  2. When his diarrhea becomes inconveniently frequent and watery.
  3. When his lips and mouth are dry.
  4. When he loses a lot of body fluids.

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20.

  1. It is a mild case of diarrhea.
  2. It is an urgent case of diarrhea.
  3. It is improving.
  4. It is deteriorating.

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M:I feel an abdominal pain and nausea.
W:Do you feel like vomiting?
M:Yes. I also have a slight fever.
W:How about your bowel movements?
M:Since this morning, I have been passing loose and watery stools several times.
W:You are suffering from diarrhea. What did you eat yesterday?
M:I ate some stale bread and other food.
W:The food might have been contaminated with bacteria.
M:Can I eat or drink anything?
W:You should drink a lot of water and fruit juice. But do not eat for a day so that your bowels will have a rest. If you eat, take small servings of soft blank foods such as porridge, cereal. Avoid large meals.
M:Should I take medication?
W:If your diarrhea is so frequent or watery as to cause inconvenience, you can take some medicines as prescribed by the doctor.
M:Is diarrhea serious?
W:Yes, only when you get dehydrated or lose much body fluids. So you should drink freely to replace the salts and water.
M:What are the signs of dehydration?
W:The signs of dehydration are inelastic skin, dry lips and mouth, tongue. If you pinch at this skin on your arm or abdomen and let go, it stands back slowly.
M:Do I have to go the clinic?
W:If your diarrhea persists for more than three or four days, you should go to the doctor, especially when the stool is black and bloody. In your present case, you don't have to worry. Just take some medicine and replace the lost fluid.