A、An examination to test ulcer. B、A way to exam ulcer in stomach. C、A way to cure gastric ulcer. D、A chemical examination. B男士问医

M: What seems to be the problem?
W: I often have a pain in the abdomen.
M: Well, can you describe the pain? Or in other words, tell me what it is like exactly?
W: Yes, here it is. It’s a dull pain.
Q: What kind of pain is it?

M: What am I suffering from, doctor?
W: According to your case history, most probably, I think you are suffering from gastric ulcer. I suggest you have a gastroscopy.
M: Gastroscopy? Oh, my god! I really fear to do it.
Q: What does gastroscopy refer to?