Theophylline ethylenediamide is administered to a client with COPD. The nurse knows that the medication is for which of the following purpose

A. To reduce bronchial secretions.
B. To relax bronchial smooth muscle.
C. To strengthen myocardial contractions.
D. To decrease alveolar elasticity.

为了证实诊断应作哪种检查

A．腹部B超

B．腹部穿刺

C．测定血钾

D．胃肠造影

E．腹部CT