I wandered lonely as a cloud
That floats on high o’er vales and hills,
When all at once I saw a crowd,

A host, of golden daffodils;
Beside the lake, beneath the trees,
Fluttering and dancing in the breeze.
Continuous as the stars that shineAnd twinkle on the milky way,
They stretched in never-ending lineAlong the margin of a bay:
Ten thousand saw I at a glance,
Tossing their heads in sprightly dance.
Questions:A. Who wrote this poem
B. What’s the title of this poem
C. What is the poem mainly about

核素肝胆动态显像中，先天性胆道闭锁的影像特点是（）

A.肠道24小时仍不出现放射性

B.胆道延迟到4小时不显影

C.胆囊延迟到4小时不显影

D.肝显影延迟

E.肝脏不显影