(1) enterprising (upward), strong (firm), firm (persistent) ...
(2 points) Be brave in dedication, care for others, be brave in sacrificing spirit and persevere. ...
2、
Encouraged → Strive for progress (positive progress) → Timid and discouraged → Full of confidence.
3、
(1) The whole yard was filled with elegant fragrance, and he was suddenly awakened by this rare strange fragrance.
(2) She is smiling at him with unprecedented beauty, and every tiny petal on her body is full of this intoxicating fragrance.
4. The author sets off (or contrasts) the cold behavior of people planing poplars (Poplar's great care and dedication to osmanthus trees highlights the image of the patron saint of poplars; Writing about osmanthus trees leaving with poplars closely follows the theme, deepening the theme of brave sacrifice for faith and sharing life and death.