Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to thicken blood before surgery [title] Alter your diet one to two weeks in advance. [step] It can take days or weeks for the thickness of your blood to change due to dietary and lifestyle habits alone. Start making these changes as early as possible to maximize the potential impact they have on your blood.

Ending1: Even if someone else studies your blood, you can still manage to remain healthy for the next few weeks with proper nutrition. [substeps] Your doctor or dietician may also recommend that you adjust your diet within a matter of weeks to stay healthy for your conditions. Ending2: [substeps] Talk to your doctor before altering your diet. They'll be able to give you specific instructions about any dietary changes you should make before your surgery. Ending3: Consider the following factors when making dietary changes. [substeps] Don't go overboard during the first few weeks. Ending4: [substeps] If you're not sure where to start, you can ask your doctor. He or she will be able to open up the possibility of changing your diet a few months in advance of your surgery.

Answer format: ending1/ending2/ending3/ending4