a.

1. 仔细的；小心的[（+of/about/with）][+to-v][+v-ing][+Wh-][+（that）]
   John was careful not to say anything about this to her.

   约翰小心翼翼，避免向她提及此事。

   Be careful with the dynamite.

   当心这炸药。

   A good writer is careful about details.

   凡是优秀作家都重视细节的描写。

   I am always careful when crossing a street.

   我过马路时总是很小心的。

2. 周到的，彻底的，精心的
   The doctor gave him a careful examination.

   医生对他作了彻底的检查。

adj.

1. taking care to avoid mishap or harm; cautious.
   ▸ (careful of/about) protective of.
   ▸ (careful with) prudent in the use of.
2. done with or showing thought and attention.