Dina, _____ for months to find a job as a waitress, finally took a position at a local advertising agency. [ ]

A. struggling

B. struggled

C. having struggled

D. to struggle

四神丸中补骨脂的作用是( )

A．固涩止泻

B．补火暖土

C．暖肝温脾

D．固肾益气

E．暖胃散寒