证券交易必须遵循的交易原则包括（）。

A.价格优先原则

B.时间优先原则

C.资金实力优先原则

D.大客户优先原则

If you can''t dig into the field you have chosen for your pursuit, it is hardly possible for you to achieve anything significant in the field.

A．acquire

B．require

C．accompany

D．accomplish