[填空题]Dear friends, Good evening and welcome to our annual Year Awards Banquet. It is such a pleasure to see so many friends here. I am hero to extend a special welcome to all of you. It is, indeed, an honor for me to have the opportunity of introducing our guest speaker for this evening. Professor Charles Stuart enjoys distinguished reputation as a speaker, educator, writer and public relation expert. He often appears as a guest on the Australia’s most popular television and radio interview programs. During his time as professor at the University of Sidney, Professor Stuart is responsible for public relations education. As a matter of fact, he has just returned from a lecture tour in China, where he discussed "trends of international public relations research", which is also his topic this evening. Welcome to Professor Charles Stuart! Who does the speaker introduce lo the people present He introduces their guest speaker ______.