请教8老师- 补交体检表格

父母绿卡收到补交体检表格通知， 我是Mail the completed I-693 form  to local Field office (as instructed by the letter) or shall I submit them in person? 　Which one is better?

Another question - Does the civil surgeon need to include the blood test results inside the envelope together with the completed/signed I-693 form?  My civil surgeon office did not do so, but I would like to confirm.   My father also had a chest X-ray done and the result is normal.   Not sure if we need to include the Chest X-ray report in the sealed envelope as well?

Thank you!