Treatment of a child with pseudomembranous colitis depends on the severity of disease. Mild cases require cessation of antibiotics and supportive therapy with fluids and electrolytes. Evaluate patients with severe or persistent antibiotic-associated colitis for C difficile toxin in the stool.
OptiFine allows zooming in by pressing the Control key. The closest thing in vanilla Minecraft is to use a bow and arrow, and aim the bow toward where you want to look, and to fire it when you are done looking.
On mine, for example, the words scroll lk on my keyboard are blue in color, which means I have to hold the function (Fn) button while I press the scroll lk button. There's a light right above my keyboard (where the caps lock and num lock are displayed) that tells me if the scroll lock is toggled on or off.