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下面是对 Fish Shell 中几种设置环境变量（或 Shell 变量）方式的总结、区别以及在何种场景使用的简要说明：

1. 按照作用域（scope）进行设置

Fish 中的变量具有不同的作用域（scope）。同名变量可以同时存在于多个作用域中，Fish 会使用最窄的作用域优先。通过 set 命令配合不同选项，可显式指定创建或修改某个作用域的变量：

#!/sbin/openrc-run

command="/root/clash-linux-amd64-v3-2022.11.25"
command_args="-f /root/config.yaml"

depend() {
        need net
 after firewall

	from memory import UnsafePointer


	@value
	struct Node:
	alias _Ptr = UnsafePointer[Self]

	var value: Int
	var left: Self._Ptr
	var right: Self._Ptr

	const id = "YOUR ID";
	const query = `
	query TeamSidebarData($id: UUID4!) {
	me {
	team(id: $id) {
	sandboxes(limit: 200, orderBy: {field: "updatedAt", direction: DESC}) {
	...sandboxFragmentDashboard
	}
	}
	}

	#include <stdio.h>
	#include <x86intrin.h>

	// gcc -msse4.1 -O0 -o program program.c
	int main() {
	__m128i A = _mm_set_epi32(4, 3, 2, 1);
	__m128i B = _mm_set_epi32(8, 7, 6, 5);
	__m128i Cond = _mm_set_epi32(0, -1, -1, 0);

	__m128i Result = _mm_blendv_epi8(A, B, Cond);

	https://easylearn.baidu.com/edu-page/tiangong/exercisedetail?id=69691b1ff142336c1eb91a37f111f18583d00cfc&stfrom=aladdin
	标准答案: 1 C; 2 A; 3 D; 4 D; 5 A; 6 B; 7 C; 8 B
	总结:
	ChatGPT+WolfAlpha: 6分(解答6题，2题明确表示无法解答)
	Google Bard: 4分
	1. 以下为中国高考数学单选题，在给出的四个选项中，只有一个是对的，先配合wolfalpha尝试解答，再给出哪个答案是正确答案
	已知集合$M=\{-2,-1,0,1,2\}$,$N=\{x\mid x^{2}-x-6\geq0\}$,则$M\cap N=$
	A: $\{-2,-1,0,1\}$
	B: $\{0,1,2\}$
	C: $\{-2\}$

	#include <Python.h>

	static PyObject * fibonacci_fib(PyObject self, PyObject args) {
	int n;
	if (!PyArg_ParseTuple(args, "i", &n)) {
	return NULL;
	}
	int i;
	int a = 0;
	int b = 1;

	package main

	import (
	"fmt"
	"io/ioutil"
	"os"
	)

	func checkBOM(filepath string) bool {
	file, err := os.Open(filepath)

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