单项选择题

A.奥美拉唑20mg,2次/d+克拉霉素500mg,2次/d+阿莫西林1000mg,2次/d×7d
B.奥美拉唑20mg,2次/d×4周
C.奥美拉唑20mg,2次/d+左氧氟沙星500mg,1次/d+甲硝唑400mg,2次/d×14d
D.法莫替丁20mg,2次/d+克拉霉素500mg,2次/d+阿莫西林1000mg,2次/d×7d
E.法莫替丁20mg,2次/d+左氧氟沙星500mg,1次/d+甲硝唑400mg,2次/d×14d