Yes, these are important but depending on what you are doing abroad and if you can persuade USCIS it was temporary in nature, will determine if it is sufficient.
An immigration attorney can assist you in crafting your argument and completing the process. Additionally, you might want to read a thorough 27 -page memo on I-864's that discusses that issue on domicile.
I suggest you consult with an immigration attorney directly for the best strategy regarding the specifics of your case. Feel free to contact the firm regarding any questions you might have regarding this response.
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