1 should not be all sorted out. First of all, the core points suitable for your thesis are similar and consistent.

In recent years, it has been better at home and abroad.

Academic papers are preferred. For example, well-known scholars (I think what can be found on Baidu should be well-known), or published in well-known newspapers. It is better to publish it internationally, which is more authoritative. The doctor's is not bad The reference value of graduate students is weak, so it is not recommended to write it into the previous research.