The best treatment for nutritional iron deficiency anemia should be
A.
Take ferrous fumarate(富马酸亚铁) before meal
B.
take ferrous gluconate (葡萄糖酸亚铁)after meal
C.
repeated small amount of multiple transfusion of red blood cells and ferrous sulfate(硫酸亚铁 )
D.
take ferrous sulfate and vitamin C between meals
E.
intramuscular administration of ferrous gluconate and vitamin C orally