这个是牛津辞典的例句,
D.obstructive
We'd have made a decision by now if Jean hadn't been so obstructive.
A.obstinate:
Adjective
Stubbornly refusing to change one's opinion or action,despite attempts to persuade one to do so.
B.obedient
Adjective
Complying with orders or requests; submissive to another's will
C.obstacle
Noun
A thing that blocks one's way or prevents or hinders progress
D.obstructive
Adjective
Causing a blockage or obstruction.