Mary is the youngest ______ the three girls. [ ]
A. in
B. than
C. of
D. at
答案：C
痛经之气血亏虚者，宜加用的腧穴是（）
A.脾俞、气海
B.归来、地机
C.肾俞、太溪
D.血海、太冲
E.太冲、太溪
