男性，60岁，发现左侧阴囊肿大1年余。体检：右阴囊肿大呈卵圆形，光滑无压痛，囊性感，睾丸不能触及。最可能的诊断是

A．睾丸肿瘤

B．附睾结核

C．睾丸鞘膜积液

D．斜疝

E．睾丸炎

Passage Four

What is the most appropriate title for this passage

A．Two Types of Stocks

B．A New Strategy of Investment

C．Distinctions between Trading and Investment

D．Conflicting Perspectives on Stock Investment