What are the benefits and drawbacks of studying abroad?

There are two sides to everything, the bad side and the good.  Such is the case with studying abroad. Do you think the young people studying abroad only have the benefits, instead of without drawbacks? I am very sure it is not so.
Firstly, the young people have decided to study abroad because they need to absorb much knowledge. It's not that they can’t learn gain the knowledge in their own countries.  Every country has the superiority in some subject. For example, most countries in Europe are good at art, America is good at hight-tech, China is good at abbr.TCM. Certainly, their families must have enought funds if they need are to study abroad, especially if they are from developing countries. They can enjoy the life in abroad and get some friends when they stay abroad. Except Other than studying the knowledge, they could get the train about develop independence. In order to really live in society,they must learn to be independent,can and not rely on others for too long time.
Finally, when the young people master gain the appropriate knowledge, they can apply it in related industries. Such as For example, some young people in China,they who want to become a doctor, lawyer or designer, they will choose to study abroad to in America, Canada, Italy, etc..  When they finish the school work their studies they would can come back,and to help their own country and its the ecomomic development of the enterprise. Their knowledge make helps our country's various industries get the progress on the basis of the original.
However, there is a kind of situation in which some young people not only studying abroad, they also they would for immigrants take up residency.  In other words, when they after graduation they could not cme do not go back to their motherlands, and instead work in their study abroad countries the country of their study.  That condition make This situation causes their motherlands to have a loss in human resources loss, so that the country's economy and science and technology can do not ger a better development as well as they could do.
In my opinion, although studying abroad have has drawbacks, the benefits are greater than the disadvantages. I support the young people studying abroad to finish so that they can fulfill their dream, get more knowledge, and hopefully they can use their harvest what they have gained to help their country's development.

Hi, I've just tried to make it sound a little more like a native speaker might write.  It's a bit long so I won't go into why I've made each change.  I hope it helps :)