Point out the antitheses in two poems and talk about their essence in detail.

The rhetorical question in the first sentence:

1, between the river and the sky, the waves are rough, the clouds are covered with fog, and they run aground.

2. Cong Ju cried a few days ago, and the lonely boat is the heart of her hometown.

The fourth part of the antithetical sentences:

1, the first houses of the princes are all new owners, both civil and military, which is different from the past.

2, straight north Guanshan golden drum vibration, levy west car horse feather book chi.

Take "princes and princes are all new owners, and civil servants and officials dress differently from the past" as an example: these two sentences lament the changes in the world, the turmoil in the current situation, and the focus on internal worries. The national fortune is not what it used to be, and the older generation of civil servants and officials have changed their owners; Central regulations, cultural relics, systems and even people's clothes are different from before. The strong artistic effect of the whole couplet further highlights the changes and influences on society caused by the An-Shi Rebellion.

Also, on the basis of fully understanding poetry, try to make an analysis.