When disease control efforts are stepped up, especially through the mass administration of medicines, causative agents are put under enormous stress, which is expressed as selective pressure.
当疾病控制努力逐步加强，尤其是通过大规模施用药物来控制疾病时，病原体被置于巨大的选择压力之下。
2
Conclusion: Administration of Penehyclidine Hydrochloride which is selective antagonist on receptor-M as Premedication is more effective and better than Atropine in abdominal surgery.
结论：选择性新型M -受体拮抗剂长托宁用于腹部外科手术术前用药临床效果优于阿托品。
3
Conclusion Local administration of capsaicin can produce selective destruction of unmyelinated fibers in primary afferent nerves, and can reduce the levels of SP in regions of CNV.