女，23岁，停经45天，阴道无异常分泌物，子宫附件声像图如下，图中所示为() ["A．正常早孕孕囊及胚外体腔","B．双胎妊娠双孕囊","C．难免流产","D．子宫肌瘤","E．早孕并宫腔积液"]
钩体传染源为_______、_______。
阳明经分布于头面部的 ["面额部","两侧部","面颊部","头顶部","头后部"]
手三阳经与足三阳经交接于 ["头","胸","腹","手","足"]
钩端螺旋体由_______、_______、_______组成。
钩体病根据临床表现的主要特点可分为______、______、______、______、______。
