jīnglǐ tīngwán yǐhòu, ràng tā gǎnjǐn huíjiā, shuō gōngzuò míngtiān zài zuò.

完 is a result complement. It shows that the action is finished or completed.

So:

• 听 = to listen / to hear
• 听完 = to finish listening / to hear all of it

This pattern is very common in Chinese:

• 看完 = finish reading/watching
• 吃完 = finish eating
• 做完 = finish doing

So 听完以后 means after finishing listening.

They do slightly different jobs:

• 完 shows that the listening action was completed.
• 以后 means after.

So together, 听完以后 literally means after having finished listening.

This is a very natural combination in Chinese. It is not considered strange or repetitive.

You could also say:

• 经理听完，让她赶紧回家。
• 经理听完后，让她赶紧回家。

All of these work, but 听完以后 sounds clear and smooth.

The object is omitted because it is understood from context.

Chinese very often leaves out objects when they are already clear. In English, learners may expect something explicit like:

• listened to her explanation
• listened to the report
• listened to what she said

But in Chinese, if everyone already knows what was heard, 听完 by itself is enough.

So the sentence does not need to say exactly what the manager listened to.

让 + person + verb phrase is a very common pattern.

Here:

• 让 = to let / ask / tell / have / make
• 她 = her
• 赶紧回家 = hurry home

So 让她赶紧回家 means something like:

• told her to hurry home
• had her hurry home
• sent her home quickly

The exact English choice depends on context.

In this sentence, told her to hurry home is usually the most natural interpretation.

赶紧 means quickly, right away, without delay, often with a sense of urgency.

So:

• 回家 = go home
• 赶紧回家 = hurry home / go home right away

Compared with 快:

• 快 can simply mean fast or quick
• 赶紧 often sounds more urgent, like don’t delay

So 让她赶紧回家 suggests the manager thought she should leave immediately.

The subject of 说 is still 经理.

Chinese often omits repeated subjects when they are already obvious from context. So after mentioning 经理, the sentence can continue with more actions by the same person:

• 听完以后
• 让她赶紧回家
• 说工作明天再做

All three actions are understood to be done by the manager.

In English, we often repeat the subject more. In Chinese, leaving it out is very normal.

It can be understood as reported speech, and Chinese often does this without quotation marks.

So 说工作明天再做 is like:

• said that the work could be done tomorrow
• said, the work can be done tomorrow

Chinese does not always need a word like that, and it does not always need quotation marks in running text.

If the writer wanted to make it look more like a direct quote, they could write something like:

• 说：工作明天再做。

But the original version is completely natural.

Here 工作 is being placed in a kind of topic position:

• 工作明天再做 = as for the work, do it tomorrow

This word order highlights the work as the thing being postponed.

A more straightforward order might be:

• 明天再做工作

But in real Chinese, 工作明天再做 sounds very natural because it puts focus on the work itself.

It is a bit like saying in English:

• The work, do it tomorrow.

That is not standard English word order, but it helps show the idea of topicalization.

This is a very important difference.

• 再 is used for something that will happen later or next
• 又 is usually used for something that happened again, often as an already realized event

Here, the work has been postponed until tomorrow, so it is a future/later action. That is why 再 is correct:

• 明天再做 = do it tomorrow / do it later, tomorrow

If you used 又, it would sound like the action had already repeated, which does not fit this situation.

So:

• 再做 = do again later / do later
• 又做了 = did again

Yes. 后 and 以后 can both mean after in this kind of sentence.

So these are all natural:

• 听完以后
• 听完后

Usually:

• 后 is a little shorter and slightly more compact
• 以后 can sound a little fuller or more conversational

In this sentence, either one works well. The meaning does not change much.