睾丸急性炎症的超声特点是（）①睾丸明显增大，表面光滑②睾丸减小，表面不光滑③睾丸回声呈均匀或点片状低回声④睾丸回声明显不均匀，呈增强回声⑤CDFI：睾丸内血流信号明显增多，PW：V_max增快，RI<0．5⑥CDFI：睾丸内血流信号减少，PW：V_max减低，RI>0．5

A.①③⑤

B.②④⑥

C.①④⑥

D.②③⑤

_______ the difficulty that he has supporting his big family, he still makes every effort to realize his dream, which I believe is __________ his reach.

A．Despite; within

B．Though; beyond

C．Though; within

D．Despite; of