1. Lower margin of the deltoid of the upper arm

　　2, hip

　　3. Front and outside of the thigh

　　4. Usually choose the best injection site -- abdomen

　　Reasons :(1) large injection area

　　(2) subcutaneous fat

　　(3) relatively few capillaries

　　(4) constant subcutaneous temperature

　　(5) fast drug absorption

　　(6) not affected by exercise