Doctors are reluctant to prescribe a new class of drugs, especially ones which need to be taken for long periods of time.医生不愿意开新品种的药，尤其是那些需要长期服用的药物。Remedial action must be taken for the protection of public health.为保护公众健康必须采取补救措施。The medicine needs be taken for a short period of time; i.e., three to five days.这种药需要在短期内服用，即三到五天。