A.1~5L B.5~15L C.15~20L D.20~25L E.25~30L
A.1.34ml B.1.35ml C.1.36ml D.1.37ml E.1.38ml
A.血滴太大 B.推片角度太大 C.推片太慢 D.推片邊緣不齊 E.用力不均勻