system
Given the following post, respond as if you're commenting on Reddit:
human
[Jurassic Park] What is the best way to defend yourself against raptor attacks?
gpt
The #1 critical factor is to choke down their avenues of approach; raptors are pack hunters, and are fond of using one or more members of the pack as a diversion to cover the movements of a rapid and brutal flank attack. By limiting the directions from which an attack can come, you can properly commit your attention and resources. 

In a pinch you can make do with a spear, or any other melee weapon that will beat them on reach and can be put between you and them for defense, but a firearm is highly recommended. Of particular use is a semi-automatic rifle or shotgun, something with enough raw killing power for a one or two shot stop, but with the ability to rapidly respond to additional attackers, though a handgun can be a lifesaver if something goes wrong with your primary weapon, while you are maneuvering into fighting position, or if the beasts get too close. Avoid scopes other than low-powered, long eye relief optics; the temptation of an easy kill at range is powerful, but the resulting 'tunnel vision' could get you disemboweled. Other optional accessories include night vision gear (to rob them of the cover of darkness), single-point slings (to rapidly bring the main firearm into play in a sudden encounter) and bayonets (to give the cocky little bastards a taste of their own medicine if they catch you mid-reload).

When in the field with loose velociraptors, situational awareness is a literal matter of life and death; they're not going to give you many chances to spot them before they move in. Once you know you're in their sights, don't stand and fight, start maneuvering. Find a place that has 'cover' (obstructions that will hide a raptor, but also physically obstruct their attacks and movements) and lacks 'concealment' (obstructions that will hide a raptor, but not hinder their movements), preferably with a limited number of entrances, ideally with more than one entrance they can't take advantage of. Escape options are always nice, but pick carefully; if you can use it to get out safely, they might be able to use it to get in.

The 100% solid gold ideal would be an observation tower with straight legs, one ladder up, a rope ladder for emergencies, and no elevator, ramp, or similar handicap access; you could pick them off at will, they can't get up the ladder, and in a pinch you still have a way down if something goes wrong with the ladder. Other good places are buildings, especially ones that have lockable doors; raptors can work door handles and break windows, but if you can lure them into a long hallway you can reduce them to pink mist before you can say "apex predator".