If your blood sample is being tested only for a complete blood count, you can eat and drink normally before the test. If your blood sample will be used for additional tests, you may need to fast for a certain amount of time before the test.
Michael Wood II, Purchaser, Retailer and Researcher of Mattresses and Sleep Products. A double and a full size are the same thing. Just different terminology. You'll find that a full size bed - through Google, etc - is 55 Wide x 75 Long. The mattress is usually an inch (or slightly more) smaller in each direction, so; your full mattress will normally measure at (average) 53.5 x 74 - the additional space is to insure that you have room to tuck sheets, etc.
But in double room, there is only one single bed. The double room can also be said to be having matrimonial beds whereas the twin room consists of single small beds. People often mistake between twin and double room when checking in hotels. Some hotels may use the term double room to mean two people in a room.