There is no point in an author producing a beautifully written abstract only for it to be rejected because it fails to meet some apparently trivial criterion. Perhaps the most common failing in an abstract is to be imprecise. The statement that 'results will be presented' merely creates the suspicion that the study is unfinished, as does 'the implications will be discussed'. It is inexcusable to write such phrases in an abstract submitted to a journal alongside the full paper and they should also be avoided in conference abstracts. When the abstract is written the results and their implications should be clear.
Readers deserve to receive information in a clear and interesting way.
It is not as easy as it seems at first sight, but it is an art that can be perfected with practice and attention to detail. A proposal for more informative abstracts of clinical articles. Annals of Internal Medicine. Doctors' responses to nursing studies. British Medical Journal.