全文获取类型
收费全文 | 55380篇 |
免费 | 2649篇 |
国内免费 | 377篇 |
专业分类
耳鼻咽喉 | 396篇 |
儿科学 | 951篇 |
妇产科学 | 649篇 |
基础医学 | 7069篇 |
口腔科学 | 1546篇 |
临床医学 | 3362篇 |
内科学 | 13609篇 |
皮肤病学 | 1211篇 |
神经病学 | 3960篇 |
特种医学 | 2220篇 |
外科学 | 9903篇 |
综合类 | 230篇 |
一般理论 | 2篇 |
预防医学 | 1705篇 |
眼科学 | 1125篇 |
药学 | 3543篇 |
中国医学 | 146篇 |
肿瘤学 | 6779篇 |
出版年
2023年 | 247篇 |
2022年 | 556篇 |
2021年 | 1165篇 |
2020年 | 631篇 |
2019年 | 883篇 |
2018年 | 1135篇 |
2017年 | 888篇 |
2016年 | 1057篇 |
2015年 | 1093篇 |
2014年 | 1430篇 |
2013年 | 1874篇 |
2012年 | 3020篇 |
2011年 | 3492篇 |
2010年 | 1981篇 |
2009年 | 1658篇 |
2008年 | 3055篇 |
2007年 | 3362篇 |
2006年 | 3246篇 |
2005年 | 3378篇 |
2004年 | 3280篇 |
2003年 | 3154篇 |
2002年 | 3199篇 |
2001年 | 1243篇 |
2000年 | 1203篇 |
1999年 | 1188篇 |
1998年 | 838篇 |
1997年 | 653篇 |
1996年 | 641篇 |
1995年 | 506篇 |
1994年 | 460篇 |
1993年 | 410篇 |
1992年 | 731篇 |
1991年 | 673篇 |
1990年 | 657篇 |
1989年 | 627篇 |
1988年 | 552篇 |
1987年 | 510篇 |
1986年 | 506篇 |
1985年 | 476篇 |
1984年 | 335篇 |
1983年 | 267篇 |
1982年 | 159篇 |
1981年 | 163篇 |
1980年 | 140篇 |
1979年 | 238篇 |
1978年 | 151篇 |
1977年 | 131篇 |
1975年 | 109篇 |
1973年 | 117篇 |
1970年 | 117篇 |
排序方式: 共有10000条查询结果,搜索用时 593 毫秒
991.
Takashi Kusakabe 《Orthopaedics and Trauma》2013,27(4):215-219
Cauda equina syndrome (CES) is a relatively uncommon but serious condition arising from a compressive lesion in the lumbar spine canal. This gives rise to a complex of symptoms including bladder dysfunction. The most common causes are disc herniation, tumour, abscess, haematoma, fracture and spinal stenosis. While clinical history and examination are important, diagnosis is usually made by imaging modalities such as MRI or CT myelography. Once diagnosed, emergency decompression surgery is necessary to prevent permanent neurological dysfunction. 相似文献
992.
Ken Inoue Kazuyoshi Nakanishi Hikmat Hadoush Hiroshi Kurumadani Akira Hashizume Toru Sunagawa Mitsuo Ochi 《Human brain mapping》2013,34(7):1559-1567
Somatosensory evoked fields in response to compression (termed as Co) and decompression (termed as De) of glabrous skin (D1, thumb; D2, index finger; D5, little finger) were recorded. Although estimated equivalent current dipoles (ECDs) following stimulation of D1 and D5 were larger, but not significantly larger, in decompression than in compression, those of D2 were significantly larger (P = 0.035). The ECDs were located in the postcentral gyrus in the order of D5De, D2De, and D1De medially, posteriorly, and superiorly in decompression but not in compression (z‐value, F = 2.692, P = 0.031). The average distance of ECDs between D1 and D5 was longer in decompression (12.8 ± 1.6 mm) than in compression (9.1 ± 1.6 mm). Our data suggest that the cortical response for the commonly used digit D2 is functionally different from those for other digits (D1 and D5) that the somatotopic variability is greater in compression. Hum Brain Mapp, 2013. © 2012 Wiley Periodicals, Inc. 相似文献
993.
Tetsushi Sakuma Sayaka Hosoi Knut Woltjen Ken‐ichi Suzuki Keiko Kashiwagi Housei Wada Hiroshi Ochiai Tatsuo Miyamoto Narudo Kawai Yasunori Sasakura Shinya Matsuura Yasushi Okada Atsuo Kawahara Shigeo Hayashi Takashi Yamamoto 《Genes to cells : devoted to molecular & cellular mechanisms》2013,18(4):315-326
994.
995.
Possible pro‐inflammatory role of heparin‐binding epidermal growth factor‐like growth factor in the active phase of systemic sclerosis
下载免费PDF全文
![点击此处可从《The Journal of dermatology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Megumi Hirabayashi Yoshihide Asano Takashi Yamashita Shunsuke Miura Kouki Nakamura Takashi Taniguchi Ryosuke Saigusa Takehiro Takahashi Yohei Ichimura Takuya Miyagawa Ayumi Yoshizaki Tomomitsu Miyagaki Makoto Sugaya Shinichi Sato 《The Journal of dermatology》2018,45(2):182-188
Heparin‐binding epidermal growth factor (EGF)‐like growth factor (HB‐EGF) is a member of the EGF family growth factors, which affects multiple aspects of the wound healing process such as epithelialization, wound contraction and angiogenesis. In our study, we measured the serum HB‐EGF levels of 51 systemic sclerosis (SSc) patients, which showed a significant increase compared with those of 20 normal subjects. Further analysis revealed a positive correlation between the HB‐EGF level and pulmonary ground‐glass score but no correlation between the former and pulmonary fibrosis score. Other findings include: a significant increase of serum sialylated carbohydrate antigen KL‐6 levels and significant shortness of disease duration in the diffuse cutaneous SSc patients with elevated HB‐EGF levels; and significantly higher HB‐EGF levels in the presence of Raynaud's phenomenon, in that of telangiectasia, and in the absence of contracture of phalanges in all SSc patients. We then evaluated HB‐EGF mRNA levels of fibroblasts harvested from skin samples of the SSc patients and those of foreskin‐derived fibroblasts treated with transforming growth factor‐β, both of which were significantly higher than each control. In conclusion, we speculate that HB‐EGF plays a pro‐inflammatory role in the active skin and lung lesions of SSc. 相似文献
996.
Mitral annular plane systolic excursion/left ventricular length (MAPSE/L) as a simple index for assessing left ventricular longitudinal function in children
下载免费PDF全文
![点击此处可从《Echocardiography (Mount Kisco, N.Y.)》网站下载免费的PDF全文](/ch/ext_images/free.gif)
997.
Yohei Miura Katsuhiro Ichikawa Ichiro Fujimura Takanori Hara Takashi Hoshino Shinji Niwa Masao Funahashi 《Radiological physics and technology》2018,11(1):54-60
The 320-detector row computed tomography (CT) system, i.e., the area detector CT (ADCT), can perform helical scanning with detector configurations of 4-, 16-, 32-, 64-, 80-, 100-, and 160-detector rows for routine CT examinations. This phantom study aimed to compare the quality of images obtained using helical scan mode with different detector configurations. The image quality was measured using modulation transfer function (MTF) and noise power spectrum (NPS). The system performance function (SP), based on the pre-whitening theorem, was calculated as MTF2/NPS, and compared between configurations. Five detector configurations, i.e., 0.5 × 16 mm (16 row), 0.5 × 64 mm (64 row), 0.5 × 80 mm (80 row), 0.5 × 100 mm (100 row), and 0.5 × 160 mm (160 row), were compared using a constant volume CT dose index (CTDIvol) of 25 mGy, simulating the scan of an adult abdomen, and with a constant effective mAs value. The MTF was measured using the wire method, and the NPS was measured from images of a 20-cm diameter phantom with uniform content. The SP of 80-row configuration was the best, for the constant CTDIvol, followed by the 64-, 160-, 16-, and 100-row configurations. The decrease in the rate of the 100- and 160-row configurations from the 80-row configuration was approximately 30%. For the constant effective mAs, the SPs of the 100-row and 160-row configurations were significantly lower, compared with the other three detector configurations. The 80- and 64-row configurations were adequate in cases that required dose efficiency rather than scan speed. 相似文献
998.
Clinicopathological features of gastric adenocarcinoma of the fundic gland (chief cell predominant type) by retrospective and prospective analyses of endoscopic findings
下载免费PDF全文
![点击此处可从《Digestive endoscopy》网站下载免费的PDF全文](/ch/ext_images/free.gif)
999.
Propensity score‐matched study of laparoscopic and open surgery for colorectal cancer in rural hospitals
下载免费PDF全文
![点击此处可从《Journal of gastroenterology and hepatology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Toshihiro Nakao Mitsuo Shimada Kozo Yoshikawa Jun Higashijima Takuya Tokunaga Masaaki Nishi Chie Takasu Hideya Kashihara Ichio Suzuka Takashi Nishizaki Hiroshi Okitsu Toshiyuki Yagi Hidenori Miyake Murato Miura Mitsutoshi Fukuyama Daisuke Wada Yoshiaki Bando 《Journal of gastroenterology and hepatology》2016,31(10):1700-1704