Several risk factors for the development of coronary disease —— (identify) by epidemiological studies.

Depression has the epidemiological characteristics of“Three High”and “One Low”, namely ( ) and low recovery rate. A: High Incidence B: High recurrence rate C: High suicide rate D: High rate of teratogenesis

The difference in epidemiological experimental studies compared with prospective cohort studies is A: Research direction from outcome to causes B: Established a control group C: Interventions were implemented for the experimental group D: Can be used for cause inference E: Can be used to verify the cause of the hypothesis

Which of the following is not the diagnostic basis for suspected COVID-19 cases？ A: Epidemiological history B: Fever and / or respiratory symptoms C: Viral genetic sequencing is highly homologous to that of known SARS-CoV-2 D: In the early stage of, the total number of white blood cells is normal or decreases, and so is or does lymphocyte count. E: With the imaging characteristics of COVID-19.