关于姜片虫病的粪便检查，正确的是()

A．确诊有赖于粪便内检出姜片虫卵

B．姜片虫卵应与肝片吸虫卵和棘隙吸虫卵相鉴别

C．直接涂片法虫卵检出率低

D．粪便虫卵计数与病情有相关性

E．水洗沉淀法虫卵检出率最高

—Did your uncle tell you ________?

—Yes, he said he went there in 2008. [ ]

A. how he goes to Wuhan

B. why did he visit Kunming

C. when he traveled to Hong Kong

D. where did he spend his vacation