I made a lot of stupid mistakes

which I should be able to catch from my own revision. I should be more careful next time.

"tiny little small world" is something I tried to emphasize the smallness, but I know my teacher will throw it out as well. :-)

Thanks for the "across and around". I have been wondering about their differences every time I used them.

You are right that I never give enough real life examples in my writing, as well as in toastmaster speech. Next time I will try harder. Whenever I need to give examples, my mind usually goes blank. I only remember the conclusion. :-(