Adding the 'the' article for proper noun and abbreviation? [duplicate]

Question

As a part-time English tutorial teacher who isn't specialized in language, I would like to ask about article usage for proper nouns and abbreviations.

Do you add 'the' for the following sentences?
"I have just returned from _____ Massachusetts Institute of Technology."
"I have just returned from _____ Hong Kong."
"I have just returned from _____ MIT."
"I have just returned from _____ HK."

The reason of asking this question is because from where I live (Hong Kong), we have a public transportation named MTR (Mass Transit Railway), which we always seem to add 'the' before 'MTR'. (Example text: https://en.wikipedia.org/wiki/MTR)
'The MTR' also appears in one of my students' text book. ("I go to school by the MTR.")

I am a bit confused by the article usage before abbreviation. My guess is:
'The' for organizations/companies;
No 'The' for location and individual's name;

But I still do not know if 'the' is needed for algorithms. For instance I am writing an academic paper about Neural Network. Should I put 'the' in front of NN?
(ie: The prediction is then carried out by ______ NN.)

I would like to hear your thoughts about article usage for abbreviations. Thanks in advance!!!
(Also I may have made some mess in the question, apologies to you who read this but passed by before.)

Update:
My confusion continues as I read more stuff:

Organization and Companies: (full name)
"Dragonair became a wholly owned subsidiary of Cathay Pacific after completion..."
https://en.wikipedia.org/wiki/Cathay_Dragon
Meanwhile: "A charter for the incorporation of the Massachusetts Institute of Technology..."
https://en.wikipedia.org/wiki/Massachusetts_Institute_of_Technology

But there is some new understanding that I would like to share:
When a proper noun/abbreviation is used to describe an object, the article usage will follow the object unless it's a location.
E.g.: an HMO facil­ity, a SWAT team
http://editingandwritingservices.com/using-articles-with-abbreviations/
Exception on location: "It started operations in July 1985 with a Boeing 737-200 service from Kai Tak International Airport..."
https://en.wikipedia.org/wiki/Cathay_Dragon

I will keep on updating when more questions pop up in my head. Great thanks!

Update 2: I have marked this as duplicate with this link.

Answer 1

Although not an English whiz, something I noted:

The article the is placed before objects or things no matter if there are multiple or just one. For example, Mass Transit Railway is a thing, so you would still call it "The MTR" as it is an object. There could exist a MTR in Antarctica, for all anyone cared. The one you and people around you call would still be "The MTR."

On the other hand,

MIT, Hong Kong, Europe are all places, so you would not put a "The" in front of them.

But, I can find a single exception to the "places rule."

The United States of America is most often preceded with a "the." Also, "The United Kingdom" and "The United Arab Emirates" are also both preceded with "the." One thing I can deduce about this exception is that they are all plural as they are a group of states or areas.

I apologize if this answer is incorrect in any way, as this is my first answer on English SE and I am learning! :D