gǎn / rǎn / liú / gǎn / hòu / tā / zài / yī / shēng / zhǐ / dǎo / xià / fú / yòng / Dá / fēi感染流感后,他在医生指导下服用达菲。After contracting the flu, he took Tamiflu under a doctor's guidance.