What is your favourite Chinese Idiom? 你最喜欢的成语是什么？

你最喜欢的成语是什么？为什么？

What is your favourite Chinese idiom? Why?

What does '天上天下' mean? ‘天上天下’ 是什么意思？ I read that phrase online somewhere and I am curious to know what it means.

独生子女政策 － 好还是不好？ China's single child policy - good or bad? Do you think China's single child policy is good or bad? Why?

你觉得一孩政策是好还是不好？为什么？

“讨论” 和 “研究” 有一样的意思吗? Does “讨论” and “研究” have the same meaning? 我要说：‘研究工作’，但是我也可以说 ‘讨论工作’ 吗？ I want to say ‘研究工作’, but will it mean the same thing if I just write ‘讨论工作’?

What does '千依百顺' mean? '千依百顺' 是什么意思？ '千依百顺' 是什么意思？ English meaning ［英语意思］ is preferred..but a answer in Mandarin is okay too. 但是中文的回答也可以。 Thank you! 谢谢

您好！Hello! 我有问题～ I have a question~ 您们好，我的名字是美玉。 我六岁的是后就学中文。。但是我的中文还很差。我最大的问题是读和写。
Hello, my name is Seraphina. I've been learning Mandarin since I was six years old. However, my chinese is still quite bad. My biggest problems are reading and writing.

我要问 I want to ask：
1）怎样可以进步读的方法？我觉得有很多字我不认识。
How can I improve my reading ability? I feel as if there are so many words that I do not recognize.
2）有什么句式是最重要的学？
What are the most essential sentence structures to know and learn?

谢谢大家～ thank you everyone~