小儿原发性腹膜炎的感染途径

A．肝硬化并发腹水，肠腔内细菌通过肠壁进入腹腔

B．胸膜炎细菌经淋巴管穿过膈肌而至腹腔

C．肠伤寒穿孔肠内容物进入腹腔

D．经血行性感染

E．经女性生殖道的上行性感染

What does the gesture “touching or pointing to one’s own nose by raised thumb” signify in western culture