A . "岂直规规治疾方术已哉"的"直"
B . "苞无穷，协惟一"的"惟"
C . "第以人心积习既久"的"第"
D . "众药聚门，适足多疑"的"适"
E . "即病者亦但知膏肓难挽"的"但"