Answers to three questions in Du Fu's poems

I watched the birds fly with my eyes wide open.

Petals shed like tears,

The old man escaped over the wall.

Three people in yecheng east,

Although the old lady is old and weak,

If you smell, cry and swallow.

Refers to heaven and earth, nature? Confidence is shaken, isn't it?

Poet saint? Epic? The new security officer? Tongguan officials? Don't get old when you get married. Don't be old? homeless

It will be the best, and all the other mountains look short under the sky. ? Petals fall like tears, and lonely birds sing their lamentations. Officials shouted why they were angry, and women cried why they were upset! ?

Run away? Still capable? End? Describe a low intermittent cry.