Answer: A, B, C

Diabetes is a group of metabolic diseases characterized by high blood sugar. Hyperglycemia is caused by defective insulin secretion, impaired biological action, or both. The long-term high blood sugar in diabetes leads to chronic damage and dysfunction of various tissues, especially the eyes, kidneys, heart, blood vessels, and nerves. Three ABCs, my country currently adopts the WHO diabetes diagnostic criteria, that is, when blood sugar elevation reaches any one of the following standards, diabetes can be diagnosed. ① Diabetes symptoms + plasma glucose level ≥11.1mmol/L at any time. ② Fasting plasma glucose (FPG) level ≥7.0mmol/L. ③In OGTT test, plasma glucose level ≥11.1mmol/L 2 hours after meal.