流行性斑疹伤寒的临床特征（）

A.皮疹

B.发热

C.脑膜刺激征

D.肝脾肿大

E.中毒性心肌炎

We were all very much attracted by the beautiful scenery________we set foot in the village. [ ]

A. quickly  

B. suddenly

C. finally  

D. immediately