Conjunctivitis may be caused by bacteria, viruses, allergens, or irritants. What signs and symptoms differentiate bacterial conjunctivitis from other types

A. Subacute onset, severe pain, and preauricular adenopathy.
B. Recurrent onset, no pain, and clear discharge.
C. Acute onset, moderate pain, and purulent discharge.
D. Acute onset, mild pain, and clear discharg

即期结售汇交易在交易日后几个工作日内交割（）。

A、当天

B、1个

C、2个