阅读下面这首词,完成问题。(8分)
鹊踏枝·过人家废园作
[清] 龚自珍[注]
漠漠春芜春不住。藤刺牵衣,碍却行人路。偏是无情偏解舞,濛濛扑面皆飞絮。绣院深沉谁是主?一朵孤花,墙角明如许。莫怨无人来折取,花开不合阳春暮。
[注] 龚自珍自幼博通多才,嘉庆十五年(1810)应顺天乡试竟只中了副榜,三年后再试又落榜,这首《鹊踏枝》就写于这一时期。
这首词主要运用了什么表现手法?体现了词人怎样的情怀?(4分)
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请评析“孤花”这一艺术形象。(4分)
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