全文获取类型
收费全文 | 258679篇 |
免费 | 52842篇 |
国内免费 | 766篇 |
专业分类
耳鼻咽喉 | 3667篇 |
儿科学 | 9919篇 |
妇产科学 | 5028篇 |
基础医学 | 42181篇 |
口腔科学 | 11250篇 |
临床医学 | 28835篇 |
内科学 | 60818篇 |
皮肤病学 | 11789篇 |
神经病学 | 31815篇 |
特种医学 | 8095篇 |
外国民族医学 | 15篇 |
外科学 | 33738篇 |
综合类 | 770篇 |
一般理论 | 129篇 |
预防医学 | 20648篇 |
眼科学 | 4518篇 |
药学 | 18223篇 |
中国医学 | 1522篇 |
肿瘤学 | 19327篇 |
出版年
2023年 | 1444篇 |
2022年 | 2312篇 |
2021年 | 5918篇 |
2020年 | 8033篇 |
2019年 | 14399篇 |
2018年 | 14882篇 |
2017年 | 14982篇 |
2016年 | 16521篇 |
2015年 | 16548篇 |
2014年 | 17844篇 |
2013年 | 21098篇 |
2012年 | 17503篇 |
2011年 | 18254篇 |
2010年 | 16283篇 |
2009年 | 11258篇 |
2008年 | 14225篇 |
2007年 | 13243篇 |
2006年 | 12457篇 |
2005年 | 11633篇 |
2004年 | 10755篇 |
2003年 | 10149篇 |
2002年 | 9602篇 |
2001年 | 4219篇 |
2000年 | 4659篇 |
1999年 | 2953篇 |
1998年 | 1626篇 |
1997年 | 1349篇 |
1996年 | 1094篇 |
1995年 | 924篇 |
1994年 | 909篇 |
1993年 | 787篇 |
1992年 | 779篇 |
1991年 | 641篇 |
1990年 | 580篇 |
1989年 | 647篇 |
1988年 | 534篇 |
1987年 | 521篇 |
1986年 | 554篇 |
1985年 | 548篇 |
1984年 | 566篇 |
1983年 | 500篇 |
1982年 | 534篇 |
1981年 | 429篇 |
1980年 | 424篇 |
1979年 | 445篇 |
1978年 | 353篇 |
1977年 | 350篇 |
1976年 | 337篇 |
1975年 | 314篇 |
1973年 | 321篇 |
排序方式: 共有10000条查询结果,搜索用时 937 毫秒
61.
62.
63.
Kun‐Yong Sung Seungkoo Lee Yeonjin Jeong Sang‐Yeul Lee 《The Australasian journal of dermatology》2021,62(1):60-63
A classic pilomatricoma, which usually presents with an asymptomatic, solitary, firm, subcutaneous nodule in the head, neck, or extremities of the paediatric population, is easily diagnosed based on its characteristic clinical and histopathological features. However, its variants often pose particular diagnostic challenges to clinicians due to their rarity and diverse clinicopathological features. We present a new pseudocystic variant, manifesting as solid lesions floating in a fluid‐filled sac. 相似文献
64.
65.
Peng‐fei Lei Shi‐long Su Ling‐yu Kong Cheng‐gong Wang Da Zhong Yi‐he Hu 《Orthopaedic Surgery》2019,11(5):914-920
Three‐dimensional (3D) printing technology, virtual reality, and augmented reality technology have been used to help surgeons to complete complex total hip arthroplasty, while their respective shortcomings limit their further application. With the development of technology, mixed reality (MR) technology has been applied to improve the success rate of complicated hip arthroplasty because of its unique advantages. We presented a case of a 59‐year‐old man with an intertrochanteric fracture in the left femur, who had received a prior left hip fusion. After admission to our hospital, a left total hip arthroplasty was performed on the patient using a combination of MR technology and 3D printing technology. Before surgery, 3D reconstruction of a certain bony landmark exposed in the surgical area was first performed. Then a veneer part was designed according to the bony landmark and connected to a reference registration landmark outside the body through a connecting rod. After that, the series of parts were made into a holistic reference registration instrument using 3D printing technology, and the patient's data for bone and surrounding tissue, along with digital 3D information of the reference registration instrument, were imported into the head‐mounted display (HMD). During the operation, the disinfected reference registration instrument was installed on the selected bony landmark, and then the automatic real‐time registration was realized by HMD through recognizing the registration landmark on the reference registration instrument, whereby the patient's virtual bone and other anatomical structures were quickly and accurately superimposed on the real body of the patient. To the best of our knowledge, this is the first report to use MR combined with 3D printing technology in total hip arthroplasty. 相似文献
66.
67.
Purpose
Chest wall pain is an uncommon but bothersome late complication following lung stereotactic body radiation therapy. Despite numerous studies investigating predictors of chest wall pain, no clear consensus has been established for a chest wall constraint. The aim of our study was to investigate factors related to chest wall pain in a homogeneous group of patients treated at our institution.Patients and methods
All 122 patients were treated with the same stereotactic body radiation therapy regimen of 48 Gy in three fractions, seen for at least 6 months of follow-up, and planned with heterogeneity correction. Chest wall pain was scored according to the Common Terminology Criteria for Adverse Events classification v3.0. Patient (age, sex, diabetes, osteoporosis), tumour (planning target volume, volume of the overlapping region between planning target volume and chest wall) and chest wall dosimetric parameters (volumes receiving at least 30, 40, and 50 Gy, the minimal doses received by the highest irradiated 1, 2, and 5 cm3, and maximum dose) were collected. The correlation between chest wall pain (grade 2 or higher) and the different parameters was evaluated using univariate and multivariate logistic regression.Results
Median follow-up was 18 months (range: 6–56 months). Twelve patients out of 122 developed chest wall pain of any grade (seven with grade 1, three with grade 2 and two with grade 3 pain). In univariate analysis, only the volume receiving 30 Gy or more (P = 0.034) and the volume of the overlapping region between the planning target volume and chest wall (P = 0.038) significantly predicted chest wall pain, but these variables were later proved non-significant in multivariate regression.Conclusion
Our analysis could not find any correlation between the studied parameters and chest wall pain. Considering our present study and the wide range of differing results from the literature, a reasonable conclusion is that a constraint for chest wall pain is yet to be defined. 相似文献68.
69.
Alejandra Gordillo Hernández Eduardo Dominguez-Adame Lanuza Auxiliadora Cano Matias Rosario Perez Huertas Katherine Maria Gallardo Rodriguez Purificacion Gallinato Perez Fernando Oliva Mompean 《World journal of gastrointestinal surgery》2015,7(8):170-173
Gangliocytic paragangliomas are rare tumors that almost exclusively occur within the second portion of the duodenum. Although these tumors generally have a benign clinical course, they have the potential to recur or metastasize to regional lymph nodes. The case report presented here describes a 57-year-old female patient with melena, progressive asthenia, anemia, and a mass in the second-third portion of the duodenum that was treated by local excision. The patient was diagnosed with a friable bleeding tumor. The histologic analysis showed that the tumor was a 4 cm gangliocytic paraganglioma without a malignant cell pattern. In the absence of local invasion or distant metastasis, endoscopic resection represents a feasible, curative therapy. Although endoscopic polypectomy is currently considered the treatment of choice, it is not recommended if the size of the tumor is > 3 cm and/or there is active or recent bleeding. Patients diagnosed with a gangliocytic paraganglioma should be closely followed-up for possible local recurrence. 相似文献
70.
Primary cutaneous anaplastic large cell lymphomas with 6p25.3 rearrangement exhibit particular histological features
下载免费PDF全文
![点击此处可从《Histopathology》网站下载免费的PDF全文](/ch/ext_images/free.gif)