— Li Lin hasn’t turned up yet, but he promised to come to the party.

— He ______ home. He is a man of keeping his word.

A．can’t leave

B．won’t be leaving

C．could have left

D．must have left

男性，40岁，约20年前开始出现右下肢肿胀，逐渐加重，其间伴有多次“丹毒”发作，现右下肢明显增粗，行走费力。查体：右下肢明显增粗，皮肤粗糙、质韧，无可凹性水肿，放射性核素检查显示浅深淋巴管均有回流不畅，在下肢远端淤滞。

下述哪项描述是正确的( )

A．诊断应为先天性淋巴水肿

B．诊断应为早发性淋巴水肿

C．诊断应为迟发性淋巴水肿

D．诊断应为继发性淋巴水肿

E．病因诊断还不明确