vscode+Arduino environment: vscode is not able to load system headers despite the configuration of paths - visual-studio-code

Question

I'm really getting frustrated with this issue.
I have installed vscode(version: 1.69.2) & Arduino IDE(version 1.8.20) on my MacOS(version 12.5), I installed the Arduino extension in the vscode, and tried to get it work.
It just works fine if I don't include the system libraries, however if I tried to include a header file, example, the 'iostream', the complier prompts me as below:
Alternatives for iostream: []
ResolveLibrary(iostream)
-> candidates: []
main:1:10: fatal error: iostream: No such file or directory
#include <iostream>
^~~~~~~~~~
compilation terminated.
exit status 1
It looks like the VScode IntelliSense could find this file, if I click this file with Command key pressed, it will show me the location of it.
iostream can be found by vscode IntelliSense
I'm assuming that IntelliSense works with the paths I set, but the compiler just cannot, I tried editing the json file several hours last night but still no luck.
Anyone has any idea about this? Your help is greatly appreciated!
Here's part of my c_cpp_properties.json file:
{
"version": 4,
"configurations": [
{
"name": "Arduino",
"compilerPath": "/Users/steveyang/Library/Arduino15/packages/arduino/tools/avr-gcc/7.3.0-atmel3.6.1-arduino7/bin/avr-g++",
"compilerArgs": [
"-w",
"-std=gnu++11",
"-fpermissive",
"-fno-exceptions",
"-ffunction-sections",
"-fdata-sections",
"-fno-threadsafe-statics",
"-Wno-error=narrowing"
],
"intelliSenseMode": "gcc-x64",
"includePath": [
"${workspaceFolder}",
"/Users/steveyang/Library/Arduino15/packages/arduino/hardware/avr/1.8.5/cores/arduino",
"/Users/steveyang/Library/Arduino15/packages/arduino/hardware/avr/1.8.5/variants/standard",
"/Users/steveyang/Library/Arduino15/packages/arduino/tools/avr-gcc/7.3.0-atmel3.6.1-arduino7/lib/gcc/avr/7.3.0/include",
"/Users/steveyang/Library/Arduino15/packages/arduino/tools/avr-gcc/7.3.0-atmel3.6.1-arduino7/lib/gcc/avr/7.3.0/include-fixed",
"/Users/steveyang/Library/Arduino15/packages/arduino/tools/avr-gcc/7.3.0-atmel3.6.1-arduino7/avr/include"
],
"forcedInclude": [
"/Users/steveyang/Library/Arduino15/packages/arduino/hardware/avr/1.8.5/cores/arduino/Arduino.h"
],
"cStandard": "c11",
"cppStandard": "c++11",
"defines": [....
],
"browse": {
"path":[
"${workspaceFolder}/",
"/usr/local/include",
"/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c++/v1",
"/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/13.1.6/include",
"/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include",
"/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include"
]
}
}
]
}