Methods Case Control Study 方法断面对照研究
Therefore, it has great significance to study control methods of suspension system.
因此，开展悬浮控制技术的研究具有重要意义。
OBJECTIVE:To study the preparation and quality control methods of ribavirin and ephedrine nasal spray and observe its clinical therapeutic efficacy.
目的：研究制定利麻鼻用喷雾剂制备和控制方法，并观察其临床疗效。
Methods: Prospective, double-blind control study.
方法：前瞻性、双盲对照研究。
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