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复发性上腹痛和消化不良等胃肠疾病很常见，一般人群发病率为２５％～４０％。目前有很多检查手段可用于这类疾病的诊断，包括试验性治疗、检测幽门螺杆菌（Hp）、上胃肠道X线造影和胃镜检查等。但对于某些疾病，如胃癌、溃疡病、食管炎和胃及十二指肠炎的诊断来说，胃镜被认为
Recurrent upper abdominal pain and indigestion and other gastrointestinal diseases are common, the general population incidence of 25% to 40%. There are many tests available for the diagnosis of such diseases, including experimental treatment, detection of Helicobacter pylori (Hp), upper gastrointestinal radiography and gastroscopy. But for some diseases, such as gastric cancer, ulcer disease, esophagitis and stomach and duodenitis diagnosis, endoscopy is considered