In such situations specific laboratory tests are necessary to establish the etiology.在此情况下,需要特异性实验来确定病原.Acute sinusitis is usually initiated by an acute respiratory tract infection of viral etiology.急性鼻窦炎常常是由病毒性病因的急性呼吸道感...
约翰有洁癖，非常害怕细菌。John is compulsively neat and clean, he's terrified of germs.他嗜赌成癖，常常债台高筑。He was a compulsive gambler and often heavily in debt.她有洁癖，整天不是用吸尘器吸尘，就是擦来擦去。She's obsessively tidy, always hoovering and p...