External ethmoidectomy is a method of choice for malignant lesions.恶性肿瘤以手术加放疗治疗,鼻外筛窦径路是治疗此类恶性肿瘤的优选术式.Objective To evaluate the effect of ethmoidectomy for the treatment of optic neuritis under nasal endoscope.目的评价鼻内窥镜下筛窦...
In this age of thermonulear technolgy, neither view can assure man's preserv ation.在当今的热核技术时代, 这两种观点都不是以保障人类的生存.The term null hypothesis arose from earlier agricultural and medical applic ation of statistics.无效假设这个概...