全文获取类型
收费全文 | 10068篇 |
免费 | 739篇 |
国内免费 | 47篇 |
专业分类
耳鼻咽喉 | 105篇 |
儿科学 | 390篇 |
妇产科学 | 230篇 |
基础医学 | 1167篇 |
口腔科学 | 278篇 |
临床医学 | 843篇 |
内科学 | 2678篇 |
皮肤病学 | 185篇 |
神经病学 | 507篇 |
特种医学 | 240篇 |
外国民族医学 | 4篇 |
外科学 | 1389篇 |
综合类 | 285篇 |
一般理论 | 5篇 |
预防医学 | 716篇 |
眼科学 | 323篇 |
药学 | 754篇 |
中国医学 | 102篇 |
肿瘤学 | 653篇 |
出版年
2023年 | 110篇 |
2022年 | 287篇 |
2021年 | 500篇 |
2020年 | 253篇 |
2019年 | 321篇 |
2018年 | 363篇 |
2017年 | 267篇 |
2016年 | 309篇 |
2015年 | 331篇 |
2014年 | 440篇 |
2013年 | 499篇 |
2012年 | 762篇 |
2011年 | 805篇 |
2010年 | 409篇 |
2009年 | 353篇 |
2008年 | 545篇 |
2007年 | 481篇 |
2006年 | 461篇 |
2005年 | 433篇 |
2004年 | 396篇 |
2003年 | 339篇 |
2002年 | 325篇 |
2001年 | 127篇 |
2000年 | 153篇 |
1999年 | 143篇 |
1998年 | 76篇 |
1997年 | 63篇 |
1996年 | 53篇 |
1995年 | 44篇 |
1994年 | 40篇 |
1993年 | 33篇 |
1992年 | 113篇 |
1991年 | 62篇 |
1990年 | 85篇 |
1989年 | 80篇 |
1988年 | 92篇 |
1987年 | 78篇 |
1986年 | 67篇 |
1985年 | 68篇 |
1984年 | 44篇 |
1983年 | 35篇 |
1982年 | 31篇 |
1981年 | 31篇 |
1979年 | 54篇 |
1978年 | 22篇 |
1977年 | 23篇 |
1974年 | 21篇 |
1973年 | 21篇 |
1972年 | 21篇 |
1969年 | 21篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
5.
6.
7.
Waseem Raza Hafiza Anum Mohy-u-Din Sajid Shaeen Malik Iqra Manzoor Baby Nadeem 《Ultrasound in medicine & biology》2019,45(1):21-25
The objective of the study was to evaluate the reliability of sonoelastography in ductal carcinoma in patients in primary and secondary health care settings. Google Scholar, PubMed, Medline, Medscape, Wikipedia and NCBI were searched in January 2018 for all original research and review articles to identify relevant studies. Two reviewers selected the articles independently for based on the title and abstract. The selection criteria were sonoelastography accuracy for diagnosing ductal carcinoma as index text, B-mode sonography, and micropure imaging; surgery and histologic findings were used as reference text; and benign and malignant breast abnormalities and ductal carcinoma were used as target conditions. Two reviewers extracted the data on selected study characteristics, and the results were used to construct the tables and figures. Fifteen studies on ductal carcinoma were found. The overall sensitivity of sonoelastography in diagnosing ductal carcinoma was 85.7%, and the specificity, 79.8%. On the basis of the literature review, it was concluded that sonoelastography has high sensitivity and specificity in diagnosing ductal carcinoma. 相似文献
8.
G Steinitz M C Martín N Gazit-Yaari M L Quesada J de la Nuez R Casillas U Malik Z B Begin 《Applied radiation and isotopes》2006,64(4):520-524
Multi-day signals, generally with duration of 2-10 days, are a prominent temporal variation type of radon (Rn) in geogas in the unsaturated zone. Rare multi-day Rn signals have been found which are characterized by: (a) a declining limb lasting up to 10 days which conforms to the radioactive decay of Rn, (b) recurs at the same location and (c) is recorded in diverse situations-volcanic and seismogenic. It suggested that a Rn blob is injected at a lower level on a steady upward flow of geogas whereby the rise and final fall of the signal are attributed to the edges of the blob while the central Rn-decay segment records the passing of the decaying blob itself. Rn-decay signals are a small subset of multi-day Rn signals which are considered as highly irregular and unusable for the understanding of geophysical processes. In difference, it is concluded that multi-day Rn signals are probably proxies of subtle geodynamic processes at upper crustal levels and are therefore significant for studying such processes. 相似文献
9.
Tass H Malik Iain A Bruce Gerard Kelly Richard T Ramsden Shakeel R Saeed 《Skull base》2007,17(4):235-238
In cases of cerebrospinal fluid (CSF) rhinorrhea following lateral skull base surgery, fibrosis and fibrin formation resulting from meningitis has been postulated as a mechanism of spontaneously resolving the CSF leak. This study was undertaken to explore any possible relationship between the cessation of CSF leak and meningitis. A retrospective study at a tertiary referral center of 232 consecutive patients was performed. Out of a total of 232 procedures, 29 patients developed CSF rhinorrhea, of whom 7 subsequently developed meningitis. Bacteria were isolated in CSF obtained at lumbar puncture in 5 cases, with the CSF analysis in the remaining 2 cases suggesting aseptic meningitis. Conservative treatment failed to stop the CSF rhinorrhea in 6 of 7 cases. In this study, the development of meningitis did not appear to aid in the resolution of the CSF rhinorrhea. We conclude that surgical intervention should not be delayed in the expectation that meningitis and conservative interventions may promote CSF leak resolution. 相似文献
10.
Sami Al-Said Ammar Ali Abdul Kader Alobaidy Emad Mojeeb Abdulla Al-Naimi Ahmed A Shokeir 《International journal of urology》2007,14(5):452-454
Xanthogranulomatous orchitis is an extremely rare inflammatory non-neoplastic destructive lesion of the testis. We report a 44-year-old man who presented with right scrotal swelling and two discharging sinuses. Testicular tumor markers were normal. Scrotal ultrasound showed heterogeneous testicular areas and irregular margin of the tunica. Surgical exploration revealed infected, unhealthy testicular tissue with necrosis and tumor-like lesion. Orchidectomy was done and histopathology showed xanthogranulomatous orchitis. 相似文献