Summarize the following:
Abrupt changes in a person's personality can be the result of prescription drugs. Someone abusing prescription drugs can become aloof or combative and argumentative. If this is a dramatic difference in the person's personality, consider the possibility that the person is abusing prescription drugs. On stimulants, the person may become talkative, but their conversation may be hard to follow. They may frequently change the subject, unable to stay focused on a topic for any length of time. You may notice a person seeming paranoid, overly anxious about what other people say or do. The person may seem defensive or argumentative, even if this is uncharacteristic. They may become less able to deal with stress, more quick-tempered or sullen.<re> Irritability is a common characteristic of someone with a prescription drug problem. The person may appear less mature than before, refusing to accept blame for any situation or minimizing her part in it. Making poor decisions, a result of not being able to think through everyday problems, is a common side-effect of drug abuse. The person may be unable to think about things unrelated to the drug. You may notice the person being more obnoxious or silly than usual. Poor concentration and problems with memory are signs of drug abuse.

summary: Consider changes in personality or mood. Observe emotional responses. Be aware of changes in the person's attention.

Summarize the following:
Type www.facebook.com into the address bar, and hit Enter or Return on your keyboard. If you're not automatically signed in, enter your email or phone and password on the top-right, and click the Log In button. You can find this button on a blue navigation bar in the upper-right corner of the page. It will open a drop-down menu. It will open your General Account Settings page. This option is listed next to a red stop sign icon on the left-hand side of the page. You can block users, messages, apps, invites and more on this page. Matching results will appear as you type. Find the friend you want to block in the matches, and click their name. This will add them to the "Block messages" list, and prevent them from sending you messages in the future.

summary: Open Facebook in your internet browser. Click the icon on the top-right. Click Settings on the drop-down menu. Click Blocking on the left sidebar. Click the text field in the "Block Messages" section. Enter the name of the user you want to block messages from. Select the friend you want to block from messaging.

Summarize the following:
Turn the water supply valve behind the toilet clockwise to turn off the water supply. Once the water's been turned off, flush the toilet to empty out the tank. You can also use a cup or a shop vac to get the water out of the tank. These are the 2 or 3 bolt heads surrounding the flapper in the bottom of the tank. You'll recognize the bolts by the rubber washers underneath them. Use a flathead screwdriver to hold the bolts in place. Then, with the adjustable wrench, turn the bolts clockwise underneath the tank to tighten them. Tightening the bolts should prevent water from seeping out from underneath the tank. Turn the water supply back on to allow the tank to refill. Wait a few minutes, then look underneath the tank to see if it's still leaking. If there's no more leak, the gasket has been fixed. If there is still a leak, the washers underneath the bolts in the tank will need to be replaced.
summary: Turn off the water and empty the water out of the tank. Locate the bolts in the tank that connect the tank to the bowl. Use an adjustable wrench and screwdriver to tighten these bolts. Refill the tank and check for leaks coming from the bolts.