Xác định vị trí cần tiêm dựa theo chỉ dẫn của bác sĩ. Bắt đầu tiêm thuốc. Xác định góc đâm kim. Tiêm thuốc vào bệnh nhân. Tiêm insulin.

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
A subcutaneous injection (SQ) is one given into the fatty layer of the skin. SQ injections are necessary for specific medications and for doses that usually require small amounts. The fat layer where the injection is given is between the skin and the muscle.  One place that is good to give a subcutaneous injection is the abdomen. Select an area below the waist and above the hip bone, and about two inches away from the belly button. Avoid the belly button area. SQ injections can be given in the t