【名词&注释】
清热解毒(heat-clearing and detoxifying)、牛蒡子(great burdock achene)、利水渗湿(inducing diuresis and excreting dampnes ...)、温经散寒(expelling pathogenic cold from channel)
[单选题]当归四逆汤中通草的作用是( )
A. 通经脉,畅血行
B. 利水渗湿
C. 活血利水
D. 温经散寒(expelling pathogenic cold from channel)
E. 散寒通络