单选题 Thismedicationmaycausedizzinessorlightheadedness,
especiallywhenrisingquicklyfromalyingtoastandingposition．
Whatisthemeaningofdizzinessorlightheadedness?

• A．低血压
• B．心跳加快
• C．呼吸困难
• D．畏光
• E．头晕眼花