如何快速计算文本字数

[[{"txt": "\u672c\u7bc7\u6587\u7ae0\u4e3b\u8981\u4ecb\u7ecd\u5982\u4f55\u5feb\u901f\u8ba1\u7b97\u6587\u672c\u5b57\u6570\u3002"}, {"img": ["https://exp-picture.cdn.bcebos.com/7efc527c34b33c413abc8ef4887de137c9762e5f.m2m?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_500%2Climit_1"]}], [{"txt": ["\u5de5\u5177/\u539f\u6599"]}, {"txt": "\u7535\u8111\uff1awindows10 \u4e13\u4e1a\u7248\uff0c64\u4f4d\u64cd\u4f5c\u7cfb\u7edf "}, {"txt": "WPS\uff1a10.1.0.7224"}, {"txt": "LEN\u51fd\u6570"}], [{"txt": ["\u65b9\u6cd5/\u6b65\u9aa4"]}, {"txt": "\u6848\u4f8b\u4e3a\uff1a\u8ba1\u7b97\u53e4\u8bd7\u7684\u5b57\u6570\uff0c\u4e0b\u9762\u6211\u4eec\u8981\u5b66\u4e60\u5982\u4f55LEN\u51fd\u6570\u8fdb\u884c\u8ba1\u7b97\u53e4\u8bd7\u7684\u5b57\u6570\uff0c\u5982\u56fe\u6240\u793a\u3002"}, {"img": ["https://exp-picture.cdn.bcebos.com/d4071b96b814f4d0a3059567cdfe474ec283235f.m2m?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_500%2Climit_1"]}, {"txt": "\u9996\u5148\u6211\u4eec\u5728\u8868\u683c\u4e0b\u8fb9\u8f93\u5165=LEN()\uff0c\u5982\u56fe\u6240\u793a\u3002"}, {"img": ["https://exp-picture.cdn.bcebos.com/b57fb6db574afa32b09a714254b2dc19ce2c145f.m2m?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_500%2Climit_1"]}, {"txt": "\u7136\u540e\u6211\u4eec\u76f4\u63a5\u9009\u62e9\u53e4\u8bd7\uff0c\u6b64\u65f6\u51fd\u6570\u4e3a\uff1a=LEN(G12)\uff0c\u5982\u56fe\u6240\u793a"}, {"img": ["https://exp-picture.cdn.bcebos.com/a1780d1fceecd3d94673af71679959430401085f.m2m?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_500%2Climit_1"]}, {"txt": "\u7136\u540e\u70b9\u51fb\u56de\u8f66\u952e\uff0cLEN\u51fd\u6570\u4f1a\u81ea\u52a8\u8ba1\u7b97\u53e4\u8bd7\u5b57\u6570\uff0c\u5982\u56fe\u6240\u793a\u3002"}, {"img": ["https://exp-picture.cdn.bcebos.com/059057299a883913d3e3b15b26bcbe2f47707c5f.m2m?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_500%2Climit_1"]}, {"txt": "\u53e4\u8bd7\u4e2d\u5982\u679c\u6709\u7a7a\u683c\uff0c\u90a3\u4e48\u6bcf\u4e2a\u7a7a\u683c\u90fd\u4f1a\u9ed8\u8ba4\u4e3a\u4e00\u4e2a\u5b57\u6570\uff0c\u5982\u56fe\u6240\u793a\u3002"}, {"img": ["https://exp-picture.cdn.bcebos.com/4759c1dae43b3b86462712e2185653bbf820755f.m2m?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_500%2Climit_1"]}, {"txt": "\u53e4\u8bd7\u4e2d\u5982\u679c\u6709\u6570\u5b57\uff0c\u90a3\u4e48\u6bcf\u4e2a\u6570\u5b57\u90fd\u4f1a\u9ed8\u8ba4\u4e3a\u4e00\u4e2a\u5b57\u6570\uff0c\u5982\u56fe\u6240\u793a\u3002"}, {"img": ["https://exp-picture.cdn.bcebos.com/65ba880b3121056149a5085c08aee8d7592a6a5f.m2m?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_500%2Climit_1"]}], [{"txt": ["\u603b\u7ed3"]}, {"txt": "1\u3001\u5728\u8868\u683c\u4e0b\u8fb9\u8f93\u5165=LEN()\uff1b2\u3001\u76f4\u63a5\u9009\u62e9\u53e4\u8bd7\uff0c\u6b64\u65f6\u51fd\u6570\u4e3a\uff1a=LEN(G12)\uff1b3\u3001\u70b9\u51fb\u56de\u8f66\u952e\uff0cLEN\u51fd\u6570\u4f1a\u81ea\u52a8\u8ba1\u7b97\u53e4\u8bd7\u5b57\u6570\uff1b4\u3001\u6bcf\u4e2a\u7a7a\u683c\u90fd\u4f1a\u9ed8\u8ba4\u4e3a\u4e00\u4e2a\u5b57\u6570\uff1b5\u3001\u6bcf\u4e2a\u6570\u5b57\u90fd\u4f1a\u9ed8\u8ba4\u4e3a\u4e00\u4e2a\u5b57\u6570\uff1b"}, {"img": ["https://exp-picture.cdn.bcebos.com/e1390a31dfb6326c0060c47a89532f632385605f.m2m?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_500%2Climit_1"]}]]