全文获取类型
收费全文 | 5844篇 |
免费 | 268篇 |
国内免费 | 40篇 |
专业分类
耳鼻咽喉 | 47篇 |
儿科学 | 148篇 |
妇产科学 | 87篇 |
基础医学 | 655篇 |
口腔科学 | 127篇 |
临床医学 | 362篇 |
内科学 | 1471篇 |
皮肤病学 | 124篇 |
神经病学 | 432篇 |
特种医学 | 288篇 |
外科学 | 652篇 |
综合类 | 14篇 |
一般理论 | 1篇 |
预防医学 | 238篇 |
眼科学 | 141篇 |
药学 | 643篇 |
中国医学 | 17篇 |
肿瘤学 | 705篇 |
出版年
2023年 | 29篇 |
2022年 | 58篇 |
2021年 | 93篇 |
2020年 | 73篇 |
2019年 | 76篇 |
2018年 | 84篇 |
2017年 | 88篇 |
2016年 | 85篇 |
2015年 | 91篇 |
2014年 | 110篇 |
2013年 | 131篇 |
2012年 | 244篇 |
2011年 | 252篇 |
2010年 | 149篇 |
2009年 | 133篇 |
2008年 | 224篇 |
2007年 | 285篇 |
2006年 | 257篇 |
2005年 | 295篇 |
2004年 | 272篇 |
2003年 | 229篇 |
2002年 | 262篇 |
2001年 | 199篇 |
2000年 | 238篇 |
1999年 | 222篇 |
1998年 | 91篇 |
1997年 | 73篇 |
1996年 | 55篇 |
1995年 | 51篇 |
1994年 | 43篇 |
1993年 | 49篇 |
1992年 | 147篇 |
1991年 | 133篇 |
1990年 | 143篇 |
1989年 | 142篇 |
1988年 | 130篇 |
1987年 | 123篇 |
1986年 | 119篇 |
1985年 | 123篇 |
1984年 | 83篇 |
1983年 | 50篇 |
1982年 | 30篇 |
1981年 | 27篇 |
1980年 | 26篇 |
1979年 | 47篇 |
1978年 | 22篇 |
1977年 | 22篇 |
1975年 | 23篇 |
1972年 | 20篇 |
1969年 | 34篇 |
排序方式: 共有6152条查询结果,搜索用时 18 毫秒
81.
82.
83.
84.
Comparison of micafungin and voriconazole as empirical antifungal therapies in febrile neutropenic patients with hematological disorders: a randomized controlled trial
下载免费PDF全文
![点击此处可从《European journal of haematology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
85.
86.
Single‐staged vs. two‐staged implant placement in vertically deficient alveolar ridges using bone ring technique ‐ Part 2: implant osseointegration
下载免费PDF全文
![点击此处可从《Clinical oral implants research》网站下载免费的PDF全文](/ch/ext_images/free.gif)
87.
Kohei Horimoto Junji Kato Yasuyuki Sumikawa Tokimasa Hida Takafumi Kamiya Sayuri Sato Hitomi Takahashi Masahide Sawada Toshiharu Yamashita Hisashi Uhara 《The Journal of dermatology》2018,45(4):487-490
We examined dermoscopic features of three cases of extraocular sebaceous carcinoma and reviewed the literatures. The yellowish structures, polymorphous vessels and ulceration were common findings in our cases and all cases of the previous reports. The appearance of whitish‐pink areas has not been described previously. Our results suggested that the combination of four dermoscopic features, whitish‐pink areas, yellowish structures, polymorphous vessels and ulceration might be distinctive in extraocular sebaceous carcinoma. 相似文献
88.
Two cases of Japanese spotted fever infected in Rokko mountain near urban area of southern Hyogo Prefecture
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)
89.
Ronald Mastouri M.D. Yasir Batres M.D. Adam Lenet M.D. Irmina Gradus‐Pizlo M.D. Jacqueline O'Donnell M.D. Harvey Feigenbaum M.D. Stephen G. Sawada M.D. 《Echocardiography (Mount Kisco, N.Y.)》2013,30(1):9-16
Background: The frequency and causes of right ventricular (RV) systolic dysfunction early after cardiac transplantation are not well defined. Methods: We investigated the prevalence and causes of RV dysfunction in 27 heart transplant recipients, as measured by lateral tricuspid annular plane excursion (TAPSE) and fractional area change (FAC) at a mean of 15 ± 11 days after transplant. Tissue Doppler imaging was used to assess systolic time velocity integral (TVI) of the RV basal free wall. A subset of 22 patients had follow‐up TAPSE measurement at 406 ± 121 days. Results: RV systolic dysfunction, defined as TAPSE > 2 standard deviation (SD) below values in a control group, was present in 100% (27/27) of patients (P < 0.05). FAC was also significantly lower in patients compared with controls (P < 0.0001). TVI confirmed the presence of RV dysfunction in all 16 patients with both TAPSE and TVI (P < 0.05). Ischemic time (P = 0.017) and posttransplant tricuspid regurgitation (P = 0.024) were independent predictors of early RV dysfunction (r = 0.753). On follow‐up, RV function improved in 15 of 22 patients but all patients remained with TAPSE > 2 SD below controls. Conclusion: This study showed that 100% of patients had reduced RV function early after transplant. Two thirds of patients had partial recovery of RV function during the first year. In all patients, however, RV function remained significantly lower than in controls. 相似文献
90.
Akihito Sawada Yoshiaki Yamaji Tetsuo Nakayama 《Journal of infection and chemotherapy》2013,19(3):480-485
Aseptic meningitis and acute parotitis have been observed after mumps vaccination. Mumps outbreaks have been reported in Japan because of low vaccine coverage, and molecular differentiation is required to determine whether these cases are vaccine associated. RT-nested PCR was performed in the small hydrophobic gene region, and viruses were differentiated by restriction fragment length polymorphism assay. A total of 584 nucleotides were amplified. The PCR product of the Hoshino strain was cut into two fragments (313 and 271 nucleotides) by MfeI; that of the Torii strain was digested with EcoT22I, resulting in 332- and 252-nucleotide fragments. Both strains were genotype B and had an XbaI site, resulting in two fragments: 299 and 285 nucleotides. Current circulating wild types were cut only by XbaI or MfeI. However, the MfeI site of the wild types was different from that of the Hoshino strain, resulting in 451- and 133-nucleotide fragments. Using three restriction enzymes, two mumps vaccine strains were distinguished from wild types, and this separation was applied to the identification of vaccine-related adverse events. 相似文献