A. Explain the disease-related knowledge, matters needing attention in oxygen use and the role of therapeutic drugs.
B. convey nervousness and panic to patients
C instruct patients to wear masks and cough etiquette correctly during hospitalization.
D instruct patients to put respiratory secretions, excreta and vomit into special containers, and pay attention to cover them.
E. instruct patients to soak and disinfect with chlorine-containing disinfectant after going to the toilet.
Correct answer: b