1. intravenous injection: 0.275g once for adults, 1-2 times a day. Dissolve in 0.9% normal saline and dilute to about 20ml before use, and slowly inject for at least 3 minutes. Children weigh milliliters per kilogram or as directed by the doctor. 2. Intravenous drip: 0.275g for adults once, 1-2 times a day. Dissolve with 0.9% physiological saline before use, dilute to about 100ml, and slowly drip for at least 30 minutes. Children weigh 5ml per kg or as directed by the doctor.