患者,男性,16岁,主诉摔伤上前牙3小时,伤后自觉患牙松动、疼痛。临床检查见临床牙冠变短,与对颌牙失去咬合,未露髓,牙齿动度约2mm,叩痛(+),X线检查未见患牙牙根连续性破坏。对该病的治疗,正确的是() ["A.即刻复位,固定","根管治疗后复位,固定","对症治疗,观察其自然萌出","复位后4周,行根管治疗","降低咬合,使患牙休息"]
某患者其眼底如图,最不可能的病因是() ["视网膜脱离术后","眼外伤","眼内炎症","光凝冷凝术后","遗传"]
下列各项,属于新生儿病态的是() ["A.马牙","B.胎怯","C.螳螂子","D.女婴生后3~5天乳房隆起如蚕豆到鸽蛋大小,2~3周消退","E.女婴生后5~7天阴道有少量流血,1~3天自止"]
人接触血吸虫疫水后,能够入侵入体内的是() ["虫卵","尾蚴","毛蚴","胞蚴","童虫"]
以下哪项措施可使水中次氯酸含量保持偏高水平() ["使水温偏高","使水温偏低","使pH偏高","使pH偏低","使浑浊度偏高"]
简述残端痛的处理。