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1) Yes, the same for both sexes: Καλημέρα [note spelling], γιατρέ. However, remember that "nouns of common gender" such as γιατρός use masculine adjectives when the noun refers to a male, and feminine adjectives when the noun refers to a female. So if there are any adjectives included, they must agree with the biological gender of the person referred to by the noun, even in the vocative case. So: Καλημέρα, αγαπητέ γιατρέ. = Good day, dear Doctor [male]. but Καλημέρα, αγαπητή γιατρέ. = Good day, dear Doctor [female].
2) Δρ, the standard Greek abbreviation for an M.D. (physician) or a Ph.D. (doctorate), stands for the more formal word δόκτωρ (demotic δόκτορας).
3) While syntax in Greek is rather flexible, it is never "not of importance". The norm nowadays is for the adjective to come before its noun -- άσπρο/λευκό [note stress] κρασί -- especially in colloquial Greek. However, in more formal speech and especially in formal writing or poetry the adjective can come after the noun -- κρασί άσπρο/λευκό -- although the tendency even here is to still come before the noun. |